Re: [gentoo-user] Re: External HDD: sector size incorrectly detected on first connect

[Marc Joliet <marcec@gmx.de>]

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Am Fri, 06 Mar 2015 18:33:13 -0800
schrieb walt <w41ter@gmail.com>:

[...]
> I once hated replies containing the question "Does it work under Windows?" but
> a bit of experience with usb3 external drives has made me rethink the matter.
> 
> Here's my thinking:  if the usb3 drive works correctly with Windows but not
> with linux, the problem is software -- i.e. the device driver.
> 
> The xhci driver is under heavy development because usb3 is still new tech, and
> I've found and reported a few bugs in the last year or so and they got fixed.
[...]

OK, so I tried this out, and it apparently worked fine under Windows 8 (I
created a third FAT32 partition for this).  Once Windows installed the drivers
(or whatever) the drive was recognised and the partition mounted without
trouble.

Immediately after that, I unplugged it and moved it back to my computer, where I
plugged it in as usual and then turned the computer on.  The problem occurred
again, of course:

    # journalctl -k -b | grep sdg
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Very big device. Trying to use READ CAPACITY(16).
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] 5860533160 512-byte logical blocks: (3.00 TB/2.72 TiB)
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Write Protect is off
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Mode Sense: 2b 00 00 00
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Very big device. Trying to use READ CAPACITY(16).
    Mär 10 17:58:57 marcec kernel:  sdg: sdg1 sdg2 sdg3
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Very big device. Trying to use READ CAPACITY(16).
    Mär 10 17:58:57 marcec kernel: sd 8:0:0:0: [sdg] Attached SCSI disk
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] Very big device. Trying to use READ CAPACITY(16).
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB)
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] Write Protect is off
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] Mode Sense: 2b 00 00 00
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB)
    Mär 10 18:00:33 marcec kernel:  sdg: sdg1 sdg2 sdg3
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] 732566645 4096-byte logical blocks: (3.00 TB/2.72 TiB)
    Mär 10 18:00:33 marcec kernel: sd 9:0:0:0: [sdg] Attached SCSI disk
    Mär 10 18:00:35 marcec kernel: BTRFS: device label MARCEC_BACKUP devid 1 transid 64666 /dev/sdg2
    Mär 10 18:00:35 marcec kernel: BTRFS info (device sdg2): disk space caching is enabled
    Mär 10 18:00:42 marcec kernel: EXT4-fs (sdg1): mounted filesystem with ordered data mode. Opts: (null)

So, what do other list members think: is it most likely a driver bug, or
something else (especially considering the reboot behaviour I mentioned in
another email)? Should I ask on the LKML, or is there a specialised ML for the
Linux USB stack?

Greetings
-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup

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