Arch Linux

subnex

Member

Registered: 2009-08-10

Posts: 15

SOLVED: Samsung T7 PSSD recognised, but doesn't appear in /dev/

I bought a Samsung T7 PSSD 1TB. 
Default formatted to exFAT.

Archlinux detects the drive, but does not mount or make any entry in /dev/. Also, no evidence of the drive is visible in parted etc.

The dmesg kernel log prints:
Plugged into USB 2 port:

[1918698.033186] usb 2-1.5: new high-speed USB device number 6 using ehci-pci
[1918698.178318] usb 2-1.5: New USB device found, idVendor=04e8, idProduct=4001, bcdDevice= 1.00
[1918698.178327] usb 2-1.5: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[1918698.178331] usb 2-1.5: Product: PSSD T7
[1918698.178333] usb 2-1.5: Manufacturer: Samsung
[1918698.178335] usb 2-1.5: SerialNumber: S6WYNS0T512785H

Plugged into USB 3 port:

[1918681.084693] usb 4-2: new SuperSpeed USB device number 9 using xhci_hcd
[1918681.101013] usb 4-2: New USB device found, idVendor=04e8, idProduct=4001, bcdDevice= 1.00
[1918681.101021] usb 4-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[1918681.101024] usb 4-2: Product: PSSD T7
[1918681.101027] usb 4-2: Manufacturer: Samsung
[1918681.101029] usb 4-2: SerialNumber: S6WYNS0T512785H

In Ubuntu 22.04, the SSD is recognised and mounts fine

[   32.104322] usb 2-1.1.3: new SuperSpeed USB device number 4 using xhci_hcd
[   32.123991] usb 2-1.1.3: New USB device found, idVendor=04e8, idProduct=4001, bcdDevice= 1.00
[   32.123996] usb 2-1.1.3: New USB device strings: Mfr=2, Product=3, SerialNumber=1
[   32.123998] usb 2-1.1.3: Product: PSSD T7
[   32.124000] usb 2-1.1.3: Manufacturer: Samsung
[   32.124001] usb 2-1.1.3: SerialNumber: S6WYNS0T512785H
[   32.140023] usbcore: registered new interface driver usb-storage
[   32.146153] scsi host0: uas
[   32.146297] usbcore: registered new interface driver uas
[   32.146883] scsi 0:0:0:0: Direct-Access     Samsung  PSSD T7          0    PQ: 0 ANSI: 6
[   32.147697] sd 0:0:0:0: Attached scsi generic sg0 type 0
[   32.148265] sd 0:0:0:0: [sda] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB)
[   32.148343] sd 0:0:0:0: [sda] Write Protect is off
[   32.148344] sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
[   32.148504] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[   32.148741] sd 0:0:0:0: [sda] Optimal transfer size 33553920 bytes
[   32.180206]  sda: sda1
[   32.211768] sd 0:0:0:0: [sda] Attached SCSI disk

And reading and writing works.

Does anyone have an idea what I am missing on my archlinux install to get this disk working?

Thanks,

Last edited by subnex (2022-09-06 08:09:34)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,114

Re: SOLVED: Samsung T7 PSSD recognised, but doesn't appear in /dev/

Did you update your kernel and haven't rebooted yet?

uname -a; pacman -Q linux

if the versions don't match you need to reboot into the new kernel, as the update will have removed the kernel modules for the old kernel.

subnex

Member

Registered: 2009-08-10

Posts: 15

Re: SOLVED: Samsung T7 PSSD recognised, but doesn't appear in /dev/

Thanks! I unfortunately did the system update and reboot just before I saw your post, so I unfortunately can't verify the installed and loaded kernel version for when the problem happened.

The system update and reboot fixed the problem.

I however hadn't done a pacman -Sy since before last reboot almost a month ago according to my log, so interesting that there apparently was a mismatch.