diff --git a/src/detection/physicaldisk/physicaldisk_nbsd.c b/src/detection/physicaldisk/physicaldisk_nbsd.c
index f14fca420..29b48017d 100644
--- a/src/detection/physicaldisk/physicaldisk_nbsd.c
+++ b/src/detection/physicaldisk/physicaldisk_nbsd.c
@@ -2,6 +2,7 @@
 #include "physicaldisk.h"
 #include "common/io.h"
 #include "common/sysctl.h"
+#include "common/debug.h"
 
 #include <util.h>
 #include <prop/proplib.h>
@@ -14,21 +15,101 @@
 #include <fcntl.h>
 #include <errno.h>
 
+static inline const char* retstsToStr(uint8_t retsts) {
+    switch (retsts) {
+        case SCCMD_OK: return "OK";
+        case SCCMD_TIMEOUT: return "TIMEOUT";
+        case SCCMD_BUSY: return "BUSY";
+        case SCCMD_SENSE: return "SENSE";
+        case SCCMD_UNKNOWN: return "UNKNOWN";
+        default: return "?";
+    }
+}
+
+#ifndef NDEBUG
+static inline const char* senseKeyToStr(uint8_t key) {
+    switch (key) {
+        case 0x0: return "No Sense";
+        case 0x1: return "Recovered Error";
+        case 0x2: return "Not Ready";
+        case 0x3: return "Medium Error";
+        case 0x4: return "Hardware Error";
+        case 0x5: return "Illegal Request";
+        case 0x6: return "Unit Attention";
+        case 0x7: return "Data Protect";
+        case 0x8: return "Blank Check";
+        case 0x9: return "Vendor Specific";
+        case 0xA: return "Copy Aborted";
+        case 0xB: return "Aborted Command";
+        case 0xC: return "Equal";
+        case 0xD: return "Volume Overflow";
+        case 0xE: return "Miscompare";
+        case 0xF: return "Completed";
+        default: return "Unknown";
+    }
+}
+
+static void logScsiSense(const char* diskName, const char* operation, const scsireq_t* req) {
+    uint8_t responseCode = req->sense[0] & 0x7F;
+    uint8_t senseKey;
+    uint8_t asc;
+    uint8_t ascq;
+
+    if (responseCode == 0x72 || responseCode == 0x73) {
+        senseKey = req->sense[1] & 0x0F;
+        asc = req->sense[2];
+        ascq = req->sense[3];
+    } else {
+        senseKey = req->sense[2] & 0x0F;
+        asc = req->sense[12];
+        ascq = req->sense[13];
+    }
+
+    FF_STRBUF_AUTO_DESTROY rawSense = ffStrbufCreate();
+    for (size_t i = 0; i < req->senselen_used; ++i) {
+        if (i)
+            ffStrbufAppendC(&rawSense, ' ');
+        ffStrbufAppendF(&rawSense, "%02X", req->sense[i]);
+    }
+
+    FF_DEBUG(
+        "%s for %s reported SENSE: response=0x%02X, key=0x%X (%s), ASC=0x%02X, ASCQ=0x%02X, raw=[%s]",
+        operation,
+        diskName,
+        responseCode,
+        senseKey,
+        senseKeyToStr(senseKey),
+        asc,
+        ascq,
+        rawSense.length ? rawSense.chars : "empty"
+    );
+}
+#else
+#define logScsiSense(...) ((void)0)
+#endif
+
 const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options) {
     FF_STRBUF_AUTO_DESTROY diskNames = ffStrbufCreate();
+    FF_DEBUG("Querying disk names via sysctl hw.disknames");
     const char* error = ffSysctlGetString("hw.disknames", &diskNames);
     if (error) {
+        FF_DEBUG("ffSysctlGetString(hw.disknames) failed: %s", error);
         return error;
     }
 
+    FF_DEBUG("Disk names: %s", diskNames.chars);
+
     char* diskName = NULL;
     size_t len = 0;
     while (ffStrbufGetdelim(&diskName, &len, ' ', &diskNames)) {
+        FF_DEBUG("Probing disk: %s", diskName);
+
         if (options->namePrefix.length && !ffStrbufStartsWith(&(FFstrbuf) {
                                                                   .chars = diskName,
                                                                   .length = (uint32_t) len,
                                                               },
                                               &options->namePrefix)) {
+            FF_DEBUG("Skipping %s due to namePrefix filter", diskName);
             continue;
         }
 
@@ -36,14 +117,19 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
         FF_AUTO_CLOSE_FD int f = opendisk(diskName, O_RDONLY, devPath, ARRAY_SIZE(devPath), 0);
         if (f < 0) {
             if (errno == EACCES) {
+                FF_DEBUG("opendisk(%s) failed: permission denied", diskName);
                 return "Permission denied; root required";
             } else {
+                FF_DEBUG("opendisk(%s) failed: %s", diskName, strerror(errno));
                 continue;
             }
         }
 
+        FF_DEBUG("Opened %s as %s", diskName, devPath);
+
         struct disklabel dl;
         if (ioctl(f, DIOCGDINFO, &dl) < 0) {
+            FF_DEBUG("ioctl(DIOCGDINFO) failed for %s: %s", diskName, strerror(errno));
             continue;
         }
 
@@ -53,6 +139,7 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
 
         prop_dictionary_t dict = NULL;
         if (prop_dictionary_recv_ioctl(f, DIOCGDISKINFO, &dict) == 0) {
+            FF_DEBUG("DIOCGDISKINFO succeeded for %s", diskName);
             prop_dictionary_get_string(dict, "type", &devType);
 
             prop_dictionary_t geometry;
@@ -60,10 +147,12 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
                 prop_dictionary_get_ulong(geometry, "sectors-per-unit", &sectorsPerUnit);
                 prop_dictionary_get_ulong(geometry, "sector-size", &sectorSize);
             } else {
+                FF_DEBUG("No geometry in diskinfo for %s, falling back to disklabel", diskName);
                 sectorsPerUnit = dl.d_secperunit;
                 sectorSize = dl.d_secsize;
             }
         } else {
+            FF_DEBUG("DIOCGDISKINFO failed for %s, falling back to disklabel", diskName);
             sectorsPerUnit = dl.d_secperunit;
             sectorSize = dl.d_secsize;
         }
@@ -80,6 +169,7 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             case DKTYPE_RUMPD:
             case DKTYPE_MD: {
                 if (options->hideType & FF_PHYSICALDISK_TYPE_VIRTUAL) {
+                    FF_DEBUG("Skipping virtual disk %s due to hideType", diskName);
                     continue;
                 }
 
@@ -91,6 +181,7 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
         uint64_t size = sectorsPerUnit * sectorSize;
         if (size == 0) {
             if (options->hideType & FF_PHYSICALDISK_TYPE_UNUSED) {
+                FF_DEBUG("Skipping unused disk %s due to hideType", diskName);
                 continue;
             }
 
@@ -106,6 +197,11 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
         device->type = type;
         device->size = size;
         device->temperature = FF_PHYSICALDISK_TEMP_UNSET;
+        FF_DEBUG("Added disk entry: name='%s', devPath='%s', interconnect='%s', size=%llu",
+            device->name.chars,
+            device->devPath.chars,
+            device->interconnect.chars,
+            (unsigned long long) device->size);
 
         if (dict) {
             prop_object_release(dict);
@@ -121,21 +217,28 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             .timeout = 1000,
             .flags = SCCMD_READ,
         };
-        if (ioctl(f, SCIOCCOMMAND, &req) == 0 && req.retsts == SCCMD_OK) {
-            ffStrbufClear(&device->name);
-            ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.vendor), inquiry.vendor);
-            ffStrbufTrimRight(&device->name, '\0');
-            ffStrbufTrimRight(&device->name, ' ');
-            ffStrbufTrimRight(&device->name, ',');
-            ffStrbufAppendC(&device->name, ' ');
-            ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.product), inquiry.product);
-            ffStrbufTrimRight(&device->name, '\0');
-            ffStrbufTrimRight(&device->name, ' ');
+        if (ioctl(f, SCIOCCOMMAND, &req) == 0) {
+            if (req.retsts == SCCMD_OK) {
+                ffStrbufClear(&device->name);
+                ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.vendor), inquiry.vendor);
+                ffStrbufTrimRight(&device->name, '\0');
+                ffStrbufTrimRight(&device->name, ' ');
+                ffStrbufTrimRight(&device->name, ',');
+                ffStrbufAppendC(&device->name, ' ');
+                ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.product), inquiry.product);
+                ffStrbufTrimRight(&device->name, '\0');
+                ffStrbufTrimRight(&device->name, ' ');
 
-            ffStrbufSetNS(&device->revision, (uint32_t) ARRAY_SIZE(inquiry.revision), inquiry.revision);
-            ffStrbufTrimRight(&device->name, '\0');
-            ffStrbufTrimRight(&device->revision, ' ');
+                ffStrbufSetNS(&device->revision, (uint32_t) ARRAY_SIZE(inquiry.revision), inquiry.revision);
+                ffStrbufTrimRight(&device->name, '\0');
+                ffStrbufTrimRight(&device->revision, ' ');
+                FF_DEBUG("SCSI inquiry for %s: name='%s', revision='%s'", diskName, device->name.chars, device->revision.chars);
+            } else {
+                FF_DEBUG("SCSI inquiry retsts != SCCMD_OK for %s (%d)", diskName, req.retsts);
+                continue;
+            }
         } else {
+            FF_DEBUG("ioctl(SCIOCCOMMAND) failed for SCSI inquiry on %s: %s", diskName, strerror(errno));
             continue;
         }
 
@@ -152,11 +255,20 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             .timeout = 1000,
             .flags = SCCMD_READ,
         };
-        if (ioctl(f, SCIOCCOMMAND, &req) == 0 && req.retsts == SCCMD_OK && evpd.header.pagecode == SINQ_VPD_UNIT_SERIAL) {
-            for (uint8_t i = 0; i < evpd.header.length[1]; ++i) {
-                ffStrbufAppendF(&device->serial, "%02X", evpd.body.serial_number[i]);
+        if (ioctl(f, SCIOCCOMMAND, &req) == 0) {
+            if (req.retsts == SCCMD_OK && evpd.header.pagecode == SINQ_VPD_UNIT_SERIAL) {
+                for (uint8_t i = 0; i < evpd.header.length[1]; ++i) {
+                    ffStrbufAppendF(&device->serial, "%02X", evpd.body.serial_number[i]);
+                }
+                ffStrbufTrimRight(&device->serial, ' ');
+                FF_DEBUG("SCSI serial for %s: %s", diskName, device->serial.chars);
+            } else if (req.retsts == SCCMD_SENSE) {
+                logScsiSense(diskName, "SCSI serial page", &req);
+            } else {
+                FF_DEBUG("SCSI serial page unavailable for %s (retsts=%s, pagecode=%u)", diskName, retstsToStr(req.retsts), (unsigned) evpd.header.pagecode);
             }
-            ffStrbufTrimRight(&device->serial, ' ');
+        } else {
+            FF_DEBUG("ioctl(SCIOCCOMMAND) failed for SCSI serial on %s: %s", diskName, strerror(errno));
         }
 #endif
 
@@ -169,9 +281,20 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             .timeout = 1000,
             .flags = SCCMD_READ,
         };
-        if (ioctl(f, SCIOCCOMMAND, &req) == 0 && req.retsts == SCCMD_OK && mode.data_length > 0) {
-            device->type |= mode.dev_spec & 0x80 ? FF_PHYSICALDISK_TYPE_READONLY : FF_PHYSICALDISK_TYPE_READWRITE;
+        if (ioctl(f, SCIOCCOMMAND, &req) == 0) {
+            if (req.retsts == SCCMD_OK && mode.data_length > 0) {
+                device->type |= mode.dev_spec & 0x80 ? FF_PHYSICALDISK_TYPE_READONLY : FF_PHYSICALDISK_TYPE_READWRITE;
+                FF_DEBUG("SCSI mode for %s indicates: %s", diskName, mode.dev_spec & 0x80 ? "readonly" : "readwrite");
+            } else if (req.retsts == SCCMD_SENSE) {
+                logScsiSense(diskName, "SCSI mode sense", &req);
+            } else {
+                FF_DEBUG("SCSI mode sense unavailable for %s (retsts=%s, data_length=%u)", diskName, retstsToStr(req.retsts), (unsigned) mode.data_length);
+            }
+        } else {
+            FF_DEBUG("ioctl(SCIOCCOMMAND) failed for SCSI mode sense on %s: %s", diskName, strerror(errno));
         }
+
+        FF_DEBUG("Detected disk '%s' (%s), type=%u", device->name.chars, diskName, (unsigned) device->type);
     }
 
     return NULL;
diff --git a/src/detection/physicaldisk/physicaldisk_obsd.c b/src/detection/physicaldisk/physicaldisk_obsd.c
index 40ae85aa6..e181f54d0 100644
--- a/src/detection/physicaldisk/physicaldisk_obsd.c
+++ b/src/detection/physicaldisk/physicaldisk_obsd.c
@@ -1,6 +1,7 @@
 #include "physicaldisk.h"
 #include "common/io.h"
 #include "common/sysctl.h"
+#include "common/debug.h"
 
 #include <util.h>
 #include <sys/ioctl.h>
@@ -11,13 +12,90 @@
 #include <fcntl.h>
 #include <errno.h>
 
+static inline const char* retstsToStr(uint8_t retsts) {
+    switch (retsts) {
+        case SCCMD_OK: return "OK";
+        case SCCMD_TIMEOUT: return "TIMEOUT";
+        case SCCMD_BUSY: return "BUSY";
+        case SCCMD_SENSE: return "SENSE";
+        case SCCMD_UNKNOWN: return "UNKNOWN";
+        default: return "?";
+    }
+}
+
+#ifndef NDEBUG
+static inline const char* senseKeyToStr(uint8_t key) {
+    switch (key) {
+        case 0x0: return "No Sense";
+        case 0x1: return "Recovered Error";
+        case 0x2: return "Not Ready";
+        case 0x3: return "Medium Error";
+        case 0x4: return "Hardware Error";
+        case 0x5: return "Illegal Request";
+        case 0x6: return "Unit Attention";
+        case 0x7: return "Data Protect";
+        case 0x8: return "Blank Check";
+        case 0x9: return "Vendor Specific";
+        case 0xA: return "Copy Aborted";
+        case 0xB: return "Aborted Command";
+        case 0xC: return "Equal";
+        case 0xD: return "Volume Overflow";
+        case 0xE: return "Miscompare";
+        case 0xF: return "Completed";
+        default: return "Unknown";
+    }
+}
+
+static void logScsiSense(const char* diskName, const char* operation, const scsireq_t* req) {
+    uint8_t responseCode = req->sense[0] & 0x7F;
+    uint8_t senseKey;
+    uint8_t asc;
+    uint8_t ascq;
+
+    if (responseCode == 0x72 || responseCode == 0x73) {
+        senseKey = req->sense[1] & 0x0F;
+        asc = req->sense[2];
+        ascq = req->sense[3];
+    } else {
+        senseKey = req->sense[2] & 0x0F;
+        asc = req->sense[12];
+        ascq = req->sense[13];
+    }
+
+    FF_STRBUF_AUTO_DESTROY rawSense = ffStrbufCreate();
+    for (size_t i = 0; i < req->senselen_used; ++i) {
+        if (i)
+            ffStrbufAppendC(&rawSense, ' ');
+        ffStrbufAppendF(&rawSense, "%02X", req->sense[i]);
+    }
+
+    FF_DEBUG(
+        "%s for %s reported SENSE: response=0x%02X, key=0x%X (%s), ASC=0x%02X, ASCQ=0x%02X, raw=[%s]",
+        operation,
+        diskName,
+        responseCode,
+        senseKey,
+        senseKeyToStr(senseKey),
+        asc,
+        ascq,
+        rawSense.length ? rawSense.chars : "empty"
+    );
+}
+#else
+#define logScsiSense(...) ((void)0)
+#endif
+
 const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options) {
     FF_STRBUF_AUTO_DESTROY diskNames = ffStrbufCreate();
+    FF_DEBUG("Querying disk names via sysctl hw.disknames");
     const char* error = ffSysctlGetString(CTL_HW, HW_DISKNAMES, &diskNames);
     if (error) {
+        FF_DEBUG("ffSysctlGetString(HW_DISKNAMES) failed: %s", error);
         return error;
     }
 
+    FF_DEBUG("Disk names: %s", diskNames.chars);
+
     char* diskName = NULL;
     size_t len = 0;
     while (ffStrbufGetdelim(&diskName, &len, ',', &diskNames)) {
@@ -26,11 +104,14 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             *colon = '\0';
         }
 
+        FF_DEBUG("Probing disk: %s", diskName);
+
         if (options->namePrefix.length && !ffStrbufStartsWith(&(FFstrbuf) {
                                                                   .chars = diskName,
                                                                   .length = (uint32_t) len,
                                                               },
                                               &options->namePrefix)) {
+            FF_DEBUG("Skipping %s due to namePrefix filter", diskName);
             continue;
         }
 
@@ -38,20 +119,26 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
         FF_AUTO_CLOSE_FD int f = opendev(diskName, O_RDONLY, OPENDEV_PART, &devPath);
         if (f < 0) {
             if (errno == EACCES) {
+                FF_DEBUG("opendev(%s) failed: permission denied", diskName);
                 return "Permission denied; root required";
             } else {
+                FF_DEBUG("opendev(%s) failed: %s", diskName, strerror(errno));
                 continue; // Unknown error
             }
         }
 
+        FF_DEBUG("Opened %s as %s", diskName, devPath);
+
         struct disklabel dl;
         if (ioctl(f, DIOCGPDINFO, &dl) < 0) {
+            FF_DEBUG("ioctl(DIOCGPDINFO) failed for %s: %s", diskName, strerror(errno));
             continue;
         }
 
         FFPhysicalDiskType type = FF_PHYSICALDISK_TYPE_NONE;
         if (dl.d_type == DTYPE_VND || dl.d_type == DTYPE_RDROOT) {
             if (options->hideType & FF_PHYSICALDISK_TYPE_VIRTUAL) {
+                FF_DEBUG("Skipping virtual disk %s due to hideType", diskName);
                 continue;
             }
 
@@ -61,6 +148,7 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
         uint64_t size = DL_GETDSIZE(&dl) * dl.d_secsize;
         if (size == 0) {
             if (options->hideType & FF_PHYSICALDISK_TYPE_UNUSED) {
+                FF_DEBUG("Skipping unused disk %s due to hideType", diskName);
                 continue;
             }
 
@@ -76,6 +164,11 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
         device->type = type;
         device->size = size;
         device->temperature = FF_PHYSICALDISK_TEMP_UNSET;
+        FF_DEBUG("Added disk entry: name='%s', devPath='%s', interconnect='%s', size=%llu",
+            device->name.chars,
+            device->devPath.chars,
+            device->interconnect.chars,
+            (unsigned long long) device->size);
 
         struct scsi_inquiry_data inquiry = {};
         struct scsireq req = {
@@ -86,20 +179,28 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             .timeout = 1000,
             .flags = SCCMD_READ,
         };
-        if (ioctl(f, SCIOCCOMMAND, &req) == 0 && req.retsts == SCCMD_OK) {
-            ffStrbufClear(&device->name);
-            ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.vendor), inquiry.vendor);
-            ffStrbufTrimRight(&device->name, '\0');
-            ffStrbufTrimRight(&device->name, ' ');
-            ffStrbufAppendC(&device->name, ' ');
-            ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.product), inquiry.product);
-            ffStrbufTrimRight(&device->name, '\0');
-            ffStrbufTrimRight(&device->name, ' ');
+        if (ioctl(f, SCIOCCOMMAND, &req) == 0) {
+            if (req.retsts == SCCMD_OK) {
 
-            ffStrbufSetNS(&device->revision, (uint32_t) ARRAY_SIZE(inquiry.revision), inquiry.revision);
-            ffStrbufTrimRight(&device->revision, '\0');
-            ffStrbufTrimRight(&device->revision, ' ');
-            device->type |= inquiry.dev_qual2 & SID_REMOVABLE ? FF_PHYSICALDISK_TYPE_REMOVABLE : FF_PHYSICALDISK_TYPE_FIXED;
+                ffStrbufClear(&device->name);
+                ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.vendor), inquiry.vendor);
+                ffStrbufTrimRight(&device->name, '\0');
+                ffStrbufTrimRight(&device->name, ' ');
+                ffStrbufAppendC(&device->name, ' ');
+                ffStrbufAppendNS(&device->name, (uint32_t) ARRAY_SIZE(inquiry.product), inquiry.product);
+                ffStrbufTrimRight(&device->name, '\0');
+                ffStrbufTrimRight(&device->name, ' ');
+
+                ffStrbufSetNS(&device->revision, (uint32_t) ARRAY_SIZE(inquiry.revision), inquiry.revision);
+                ffStrbufTrimRight(&device->revision, '\0');
+                ffStrbufTrimRight(&device->revision, ' ');
+                device->type |= inquiry.dev_qual2 & SID_REMOVABLE ? FF_PHYSICALDISK_TYPE_REMOVABLE : FF_PHYSICALDISK_TYPE_FIXED;
+                FF_DEBUG("SCSI inquiry for %s: name='%s', revision='%s'", diskName, device->name.chars, device->revision.chars);
+            } else {
+                FF_DEBUG("SCSI inquiry retsts != SCCMD_OK for %s (%d)", diskName, req.retsts);
+            }
+        } else {
+            FF_DEBUG("ioctl(SCIOCCOMMAND) failed for SCSI inquiry on %s: %s", diskName, strerror(errno));
         }
 
         struct scsi_vpd_serial evpd = {};
@@ -111,11 +212,20 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             .timeout = 1000,
             .flags = SCCMD_READ,
         };
-        if (ioctl(f, SCIOCCOMMAND, &req) == 0 && req.retsts == SCCMD_OK && evpd.hdr.page_code == SI_PG_SERIAL) {
-            for (uint8_t i = 0; i < evpd.hdr.page_length[1]; ++i) {
-                ffStrbufAppendF(&device->serial, "%02X", evpd.serial[i]);
+        if (ioctl(f, SCIOCCOMMAND, &req) == 0) {
+            if (req.retsts == SCCMD_OK && evpd.hdr.page_code == SI_PG_SERIAL) {
+                for (uint8_t i = 0; i < evpd.hdr.page_length[1]; ++i) {
+                    ffStrbufAppendF(&device->serial, "%02X", evpd.serial[i]);
+                }
+                ffStrbufTrimSpace(&device->serial);
+                FF_DEBUG("SCSI serial for %s: %s", diskName, device->serial.chars);
+            } else if (req.retsts == SCCMD_SENSE) {
+                logScsiSense(diskName, "SCSI serial page", &req);
+            } else {
+                FF_DEBUG("SCSI serial page unavailable for %s (retsts=%s, pagecode=%u)", diskName, retstsToStr(req.retsts), (unsigned) evpd.hdr.page_code);
             }
-            ffStrbufTrimSpace(&device->serial);
+        } else {
+            FF_DEBUG("ioctl(SCIOCCOMMAND) failed for SCSI serial on %s: %s", diskName, strerror(errno));
         }
 
         struct scsi_mode_header mode = {};
@@ -127,9 +237,20 @@ const char* ffDetectPhysicalDisk(FFlist* result, FFPhysicalDiskOptions* options)
             .timeout = 1000,
             .flags = SCCMD_READ,
         };
-        if (ioctl(f, SCIOCCOMMAND, &req) == 0 && req.retsts == SCCMD_OK && mode.data_length > 0) {
-            device->type |= mode.dev_spec & 0x80 ? FF_PHYSICALDISK_TYPE_READONLY : FF_PHYSICALDISK_TYPE_READWRITE;
+        if (ioctl(f, SCIOCCOMMAND, &req) == 0) {
+            if (req.retsts == SCCMD_OK) {
+                device->type |= mode.dev_spec & 0x80 ? FF_PHYSICALDISK_TYPE_READONLY : FF_PHYSICALDISK_TYPE_READWRITE;
+                FF_DEBUG("SCSI mode for %s indicates: %s", diskName, mode.dev_spec & 0x80 ? "readonly" : "readwrite");
+            } else if (req.retsts == SCCMD_SENSE) {
+                logScsiSense(diskName, "SCSI mode sense", &req);
+            } else {
+                FF_DEBUG("SCSI mode sense unavailable for %s (retsts=%s, data_length=%u)", diskName, retstsToStr(req.retsts), (unsigned) mode.data_length);
+            }
+        } else {
+            FF_DEBUG("ioctl(SCIOCCOMMAND) failed for SCSI mode sense on %s: %s", diskName, strerror(errno));
         }
+
+        FF_DEBUG("Detected disk '%s' (%s), type=%u", device->name.chars, diskName, (unsigned) device->type);
     }
 
     return NULL;