On Tue, Jun 22, 2021 at 4:05 AM Patrick O'Callaghan
<pocallag...@gmail.com> wrote:
>
> One other data point and I'll leave it unless anything else turns up: I
> switched the two drives in the dock and got this from dmesg:
>
> [Tue Jun 22 10:52:03 2021] usb 4-3: USB disconnect, device number 2
> [Tue Jun 22 10:52:03 2021] sd 6:0:0:0: [sdd] Synchronizing SCSI cache
> [Tue Jun 22 10:52:03 2021] sd 6:0:0:0: [sdd] Synchronize Cache(10) failed: 
> Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
> [Tue Jun 22 10:52:03 2021] sd 6:0:0:1: [sde] Synchronizing SCSI cache
> [Tue Jun 22 10:52:03 2021] sd 6:0:0:1: [sde] Synchronize Cache(10) failed: 
> Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK
> [Tue Jun 22 10:52:27 2021] usb 4-3: new SuperSpeed Gen 1 USB device number 4 
> using xhci_hcd
> [Tue Jun 22 10:52:27 2021] usb 4-3: New USB device found, idVendor=174c, 
> idProduct=55aa, bcdDevice= 1.00
> [Tue Jun 22 10:52:27 2021] usb 4-3: New USB device strings: Mfr=2, Product=3, 
> SerialNumber=1
> [Tue Jun 22 10:52:27 2021] usb 4-3: Product: ASM1156-PM
> [Tue Jun 22 10:52:27 2021] usb 4-3: Manufacturer: ASMT
> [Tue Jun 22 10:52:27 2021] usb 4-3: SerialNumber: 00000000000000000000
> [Tue Jun 22 10:52:27 2021] scsi host6: uas
> [Tue Jun 22 10:52:27 2021] scsi 6:0:0:0: Direct-Access     ASMT     
> ASM1156-PM       0    PQ: 0 ANSI: 6
> [Tue Jun 22 10:52:28 2021] scsi 6:0:0:1: Direct-Access     ASMT     
> ASM1156-PM       0    PQ: 0 ANSI: 6
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: Attached scsi generic sg4 type 0
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:1: Attached scsi generic sg5 type 0
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] 1953525168 512-byte logical 
> blocks: (1.00 TB/932 GiB)
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] 4096-byte physical blocks
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] Write Protect is off
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] Mode Sense: 43 00 00 00
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:1: [sde] 1953525168 512-byte logical 
> blocks: (1.00 TB/932 GiB)
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:1: [sde] 4096-byte physical blocks
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] Write cache: enabled, read 
> cache: enabled, doesn't support DPO or FUA
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:1: [sde] Write Protect is off
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:1: [sde] Mode Sense: 43 00 00 00
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] Optimal transfer size 33553920 
> bytes not a multiple of physical block size (4096 bytes)
> [Tue Jun 22 10:52:28 2021] sd 6:0:0:0: [sdd] Attached SCSI disk
> [Tue Jun 22 10:52:58 2021] sd 6:0:0:1: tag#26 uas_eh_abort_handler 0 uas-tag 
> 2 inflight: IN <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<***
> [Tue Jun 22 10:52:58 2021] sd 6:0:0:1: tag#26 CDB: Mode Sense(6) 1a 00 08 00 
> 04 00
> [Tue Jun 22 10:52:58 2021] scsi host6: uas_eh_device_reset_handler start
> [Tue Jun 22 10:52:58 2021] usb 4-3: reset SuperSpeed Gen 1 USB device number 
> 4 using xhci_hcd
> [Tue Jun 22 10:52:58 2021] scsi host6: uas_eh_device_reset_handler success
> [Tue Jun 22 10:52:58 2021] sd 6:0:0:1: [sde] Write cache: enabled, read 
> cache: enabled, doesn't support DPO or FUA
> [Tue Jun 22 10:52:58 2021] sd 6:0:0:1: [sde] Optimal transfer size 33553920 
> bytes not a multiple of physical block size (4096 bytes)
> [Tue Jun 22 10:52:58 2021] sd 6:0:0:1: [sde] Attached SCSI disk
>
> The uas message is again from device 6:0:0:1 as before, even though the
> disks have been swapped. IOW the issue definitely comes from the dock,
> not from the physical drives themselves.

I don't know if it's coming from the dock's usb chipset or the
usb-sata adapter on the drive. That adapter has a chipset on it also.
These are exactly the sorts of problems often resolved by putting both
drives on a USB hub, and then the hub into the dock.



-- 
Chris Murphy
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