Re: Debugging SCSI 'UNMAP' ("Logical Block Provisioning") failure on an SSD

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Wed, Mar 14, 2018 at 12:29:50PM +0100, Oliver Neukum wrote:
> Am Mittwoch, den 14.03.2018, 11:22 +0100 schrieb Kashyap Chamarthy:
> > I see.  So I ran `dmesg -w`, as I attached the disk & see the following:
> 
> UAS and no quirk for your device. It looks like it indeed just does
> not support TRIM.

Sorry, I didn't give you complete information — with the previous
`dmesg` output, I actually attached the SSD (Samsung T5) via regular USB
"A Cable".  

Now, I re-attached the SSD via the "Thunderbolt" port on my other laptop
(Lenovo T470s), it _does_ show "UAS".   Refer the arrow below:

[...]
[131839.680706] usb 4-1: new SuperSpeedPlus USB device number 2 using xhci_hcd
[131839.698814] usb 4-1: New USB device found, idVendor=04e8, idProduct=61f5
[131839.698817] usb 4-1: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[131839.698818] usb 4-1: Product: Portable SSD T5
[131839.698819] usb 4-1: Manufacturer: Samsung
[131839.698820] usb 4-1: SerialNumber: 1234567A7AD6
[131839.701232] scsi host2: uas   <-------------------------------
[131839.701631] scsi 2:0:0:0: Direct-Access     Samsung  Portable SSD T5  0    PQ: 0 ANSI: 6
[131839.703470] sd 2:0:0:0: Attached scsi generic sg1 type 0
[131839.705486] sd 2:0:0:0: [sdc] 976773168 512-byte logical blocks: (500 GB/466 GiB)
[131839.705895] sd 2:0:0:0: [sdc] Write Protect is off
[131839.705900] sd 2:0:0:0: [sdc] Mode Sense: 43 00 00 00
[131839.706146] sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[131839.709656] sd 2:0:0:0: [sdc] Attached SCSI disk
[131839.927167] EXT4-fs (sdc): recovery complete
[131839.927175] EXT4-fs (sdc): mounted filesystem with ordered data mode. Opts: (null)
[...]

-- 
/kashyap
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Media]     [Linux Input]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Old Linux USB Devel Archive]

  Powered by Linux