"Read Capacity(10) failed" and "Sense Key : Illegal Request" with a SATA-to-USB adapter
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What is the meaning of these error messages in the system log, when I plug in [a 2.5" spinning-disk SATA drive](https://www.seagate.com/files/staticfiles/support/docs/samsung-ds/100698122c.pdf) that I _know_ works, using a [USB-to-SATA adapter](https://web.archive.org/web/20230401071626/https://sabrent.com/products/ec-ss31) ?
Jun 25 16:08:07 hostname kernel: [181603.928983] scsi 6:0:0:0: Direct-Access SABRENT 2210 PQ: 0 ANSI: 6
Jun 25 16:08:07 hostname kernel: [181603.931640] sd 6:0:0:0: Attached scsi generic sg1 type 0
Jun 25 16:08:07 hostname kernel: [181603.938380] sd 6:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_OK driverbyte=DRIVER_OK
Jun 25 16:08:07 hostname kernel: [181603.938391] sd 6:0:0:0: [sdb] Sense Key : Illegal Request [current]
Jun 25 16:08:07 hostname kernel: [181603.938398] sd 6:0:0:0: [sdb] Add. Sense: Invalid command operation code
Jun 25 16:08:07 hostname kernel: [181603.939443] sd 6:0:0:0: [sdb] 0 512-byte logical blocks: (0 B/0 B)
Jun 25 16:08:07 hostname kernel: [181603.939449] sd 6:0:0:0: [sdb] 0-byte physical blocks
Jun 25 16:08:07 hostname kernel: [181603.942357] sd 6:0:0:0: [sdb] Test WP failed, assume Write Enabled
Jun 25 16:08:07 hostname kernel: [181603.943386] sd 6:0:0:0: [sdb] Asking for cache data failed
Jun 25 16:08:07 hostname kernel: [181603.943393] sd 6:0:0:0: [sdb] Assuming drive cache: write through
Jun 25 16:08:07 hostname kernel: [181603.944506] sd 6:0:0:0: [sdb] Optimal transfer size 33553920 bytes not a multiple of physical block size (0 bytes)
Jun 25 16:08:07 hostname kernel: [181603.948248] sd 6:0:0:0: [sdb] Read Capacity(10) failed: Result: hostbyte=DID_OK driverbyte=DRIVER_OK
Jun 25 16:08:07 hostname kernel: [181603.948255] sd 6:0:0:0: [sdb] Sense Key : Illegal Request [current]
Jun 25 16:08:07 hostname kernel: [181603.948257] sd 6:0:0:0: [sdb] Add. Sense: Invalid command operation code
Jun 25 16:08:07 hostname kernel: [181603.960998] sd 6:0:0:0: [sdb] Attached SCSI disk
Specifically:
[…] Read Capacity(10) failed: Result: hostbyte=DID_OK driverbyte=DRIVER_OK
[…] Sense Key : Illegal Request [current]
[…] Add. Sense: Invalid command operation code
The device spins up fine mechanically with no unusual noises, but none of the partitions are being detected, and as a result, they don't show up in the file manager.
I don't think this matters much, but just to provide some context, it's an Ubuntu 20.04-based distribution (elementary OS 6.1 Jólnir) running on a Samsung Series 9.
Asked by Kevin E
(540 rep)
Jun 25, 2023, 09:06 PM
Last activity: Jul 29, 2025, 10:45 AM
Last activity: Jul 29, 2025, 10:45 AM