From: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com>
To: victorhooi@yahoo.com
Cc: linux-btrfs@vger.kernel.org
Subject: Re: Btrfs - Unable to mount, can't read superblock?
Date: Mon, 15 Feb 2010 09:28:23 +0900 [thread overview]
Message-ID: <4B789527.1040309@jp.fujitsu.com> (raw)
In-Reply-To: <d0c6e4d91002130445x18cbb05fv6e54411283158775@mail.gmail.com>
Hi,
This disk was used as /dev/sdd previously, and now it's named
/dev/sdc, isn't it?
If so, you can use this usb disk after reboot, or adjusting
that the disk is recognized as /dev/sdd.
Btrfs does not support device file renaming yet.
Regards,
taruisi
(2010/02/13 21:45), Victor Hooi wrote:
> heya,
>
> This is on kernel 2.6.32.8-1, on Arch Linux 64-bit. I have an external
> harddisk, with a btrfs filessystem on it. Just now, after a reboot, I
> seem to be unable to mount it.
>
> KDE gives a message about being unable to find the superblock, trying
> to mount it from the command-line gives something similar:
>
>> mount: /dev/sdc1: can't read superblock
>
> I do know the last time I used the disk, it may not have been
> unmounted cleanly. Could that have caused this current issue? Any
> possible remedy? I'm really hoping it is, because that's a 1.5 Tb
> external disk...lol.
>
> Also, dmesg contains:
>>
>> usb 2-2: new high speed USB device using ehci_hcd and address 8
>> usb 2-2: configuration #1 chosen from 1 choice
>> scsi10 : SCSI emulation for USB Mass Storage devices
>> usb-storage: device found at 8
>> usb-storage: waiting for device to settle before scanning
>> scsi 10:0:0:0: Direct-Access WDC WD15 EADS-00P8B0 PQ: 0 ANSI: 2
>> sd 10:0:0:0: Attached scsi generic sg2 type 0
>> usb-storage: device scan complete
>> sd 10:0:0:0: [sdc] 2930277168 512-byte logical blocks: (1.50 TB/1.36 TiB)
>> sd 10:0:0:0: [sdc] Write Protect is off
>> sd 10:0:0:0: [sdc] Mode Sense: 38 00 00 00
>> sd 10:0:0:0: [sdc] Assuming drive cache: write through
>> sd 10:0:0:0: [sdc] Assuming drive cache: write through
>> sdc: sdc1
>> sd 10:0:0:0: [sdc] Assuming drive cache: write through
>> sd 10:0:0:0: [sdc] Attached SCSI disk
>> device label tessier-ashpool devid 1 transid 4882 /dev/sdc1
>> open /dev/sdd1 failed
>
> Cheers,
> Victor
> --
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next prev parent reply other threads:[~2010-02-15 0:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-13 12:45 Btrfs - Unable to mount, can't read superblock? Victor Hooi
2010-02-15 0:28 ` TARUISI Hiroaki [this message]
2010-02-15 9:57 ` Victor Hooi
2010-02-15 10:16 ` TARUISI Hiroaki
2010-02-16 15:47 ` Chris Mason
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