-----Original Message----- From: Martin K. Petersen [mailto:martin.petersen@xxxxxxxxxx] Sent: Wednesday, August 7, 2019 10:04 PM To: Justin Piszcz Cc: 'LKML'; linux-usb@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx Subject: Re: 5.2.x kernel: WD 8TB USB Drives: Unaligned partial completion (resid=78, sector_sz=512) Justin, > Attached 2 x brand new Western Digital 8TB USB 3.0 drives awhile back and > ran some file copy tests and was getting these warnings-- is there any way > to avoid these warnings? I did confirm with parted that the partition was > aligned but this appears to be something related to the firmware on the > device according to [1] and [2]? Please send us the output of: # sg_vpd -p bl /dev/sdN # sg_vpd -p bdc /dev/sdN # sg_readcap -l /dev/sdN [ .. ] Disk type: --- Disk /dev/sdf: 7.3 TiB, 8001562869760 bytes, 15628052480 sectors Disk model: My Book 25EE # sg_vpd -p bl /dev/sdf > /tmp/sg_vpd_bl.txt # sg_vpd -p bdc /dev/sdf > /tmp/sg_vpd_bdc.txt # sg_readcap -l /dev/sdf > /tmp/sg_readcap.txt # ls -l /tmp/sg_vpd_bl.txt /tmp/sg_vpd_bdc.txt /tmp/sg_readcap.txt -rw-r--r-- 1 root root 421 Aug 8 04:26 /tmp/sg_readcap.txt -rw-r--r-- 1 root root 244 Aug 8 04:25 /tmp/sg_vpd_bdc.txt -rw-r--r-- 1 root root 972 Aug 8 04:25 /tmp/sg_vpd_bl.txt Output: sg_readcap.txt Read Capacity results: Protection: prot_en=0, p_type=0, p_i_exponent=0 Logical block provisioning: lbpme=0, lbprz=0 Last LBA=15628052479 (0x3a38127ff), Number of logical blocks=15628052480 Logical block length=512 bytes Logical blocks per physical block exponent=3 [so physical block length=4096 bytes] Lowest aligned LBA=0 Hence: Device size: 8001562869760 bytes, 7630885.0 MiB, 8001.56 GB, 8.00 TB sg_vpd_bdc.txt Block device characteristics VPD page (SBC): Nominal rotation rate: 5400 rpm Product type: Not specified WABEREQ=0 WACEREQ=0 Nominal form factor: 3.5 inch ZONED=0 RBWZ=0 BOCS=0 FUAB=0 VBULS=0 DEPOPULATION_TIME=0 (seconds) sg_vpd_bl.txt Block limits VPD page (SBC): Write same non-zero (WSNZ): 0 Maximum compare and write length: 0 blocks [Command not implemented] Optimal transfer length granularity: 8 blocks Maximum transfer length: 65535 blocks Optimal transfer length: 65535 blocks Maximum prefetch transfer length: 65535 blocks Maximum unmap LBA count: 0 [Unmap command not implemented] Maximum unmap block descriptor count: 0 [Unmap command not implemented] Optimal unmap granularity: 0 blocks [not reported] Unmap granularity alignment valid: false Unmap granularity alignment: 0 [invalid] Maximum write same length: 0 blocks [not reported] Maximum atomic transfer length: 0 blocks [not reported] Atomic alignment: 0 [unaligned atomic writes permitted] Atomic transfer length granularity: 0 [no granularity requirement Maximum atomic transfer length with atomic boundary: 0 blocks [not reported] Maximum atomic boundary size: 0 blocks [can only write atomic 1 block]
