On 04/22/2011 03:44 PM, Lukas Czerner wrote: > On Fri, 22 Apr 2011, Tao Ma wrote: > >> 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... > > Actually you can query that with hdparm -I /path/to/the/device and you > should see something like > > * Data Set Management TRIM supported > > in the output. oh, yes, I just tried the latest hdparm(9.37) and it does support trim detection now! Thanks for the hint. So I am still living in the rhel5 period. :( Regards, Tao -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
