From: Tao Ma <tm@tao.ma>
To: Keith Mannthey <kmannth@us.ibm.com>
Cc: linux-ext4@vger.kernel.org
Subject: Re: Quick EXT4 discard question
Date: Fri, 22 Apr 2011 10:27:54 +0800 [thread overview]
Message-ID: <4DB0E7AA.6070007@tao.ma> (raw)
In-Reply-To: <1303433101.1389.132.camel@keith-laptop>
On 04/22/2011 08:45 AM, Keith Mannthey wrote:
> Hello,
> I am using some Intel SSD drives with 2.6.38.2.
>
>
> /proc/scsi/scsi identifies them as:
>
> "
> Host: scsi4 Channel: 00 Id: 04 Lun: 00
> Vendor: ATA Model: INTEL SSDSA2M080 Rev: 02M3
> Type: Direct-Access ANSI SCSI revision: 05
> "
>
> Sometimes I am see the following messages that indicate discard is
> disabled during runtime:
>
> Relevant dmesg:
>
> ...
> EXT4-fs (sdw): mounted filesystem with ordered data mode. Opts: nobarrier,discard
> EXT4......
>
> .... (some time later)
>
> EXT4-fs warning (device sdw): release_blocks_on_commit:2672: discard not supported, disabling
> EXT4-fs warning (device sds): release_blocks_on_commit:2672: discard not supported, disabling
> EXT4-fs warning (device sdt): release_blocks_on_commit:2672: discard not supported, disabling
> EXT4-fs warning (device sdu): release_blocks_on_commit:2672: discard not supported, disabling
> EXT4-fs warning (device sdv): release_blocks_on_commit:2672: discard not supported, disabling
Please check whether your ssd works with discard or whether your ssd
firmware has the ability to do so.
I used an SSDSA2M160(I guess you are using the same type as me except
the volume size is 80g, but you have to find it out from intel side) and
after I upgraded my firmware to the new version(you can download it from
intel site), it supports discard now.
Regards,
Tao
next prev parent reply other threads:[~2011-04-22 2:28 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-22 0:45 Quick EXT4 discard question Keith Mannthey
2011-04-22 2:27 ` Tao Ma [this message]
2011-04-22 2:44 ` Keith Mannthey
2011-04-22 2:53 ` Tao Ma
2011-04-22 7:44 ` Lukas Czerner
2011-04-22 8:31 ` Tao Ma
2011-04-22 16:08 ` Keith Mannthey
2011-04-23 14:23 ` Eric Sandeen
2011-04-22 19:59 ` Greg Freemyer
-- strict thread matches above, loose matches on Subject: below --
2011-04-23 6:41 Girish Shilamkar
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