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 10:53:37 +0800 [thread overview]
Message-ID: <4DB0EDB1.2070506@tao.ma> (raw)
In-Reply-To: <1303440294.1389.136.camel@keith-laptop>
On 04/22/2011 10:44 AM, Keith Mannthey wrote:
> On Fri, 2011-04-22 at 10:27 +0800, Tao Ma wrote:
>> 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.
>
>
> Firmware is up to date as of a few weeks ago. It is 02M3 which still
> looks to be the current version.
ok...
So please check whether your device supports discard or not.
Intel has a tool named Intel SSD Toolbox, and it can check the status of
your ssd, but the bad thing is that it seems to only have a windows
version...
Regards,
Tao
next prev parent reply other threads:[~2011-04-22 2:53 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
2011-04-22 2:44 ` Keith Mannthey
2011-04-22 2:53 ` Tao Ma [this message]
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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