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. Thanks! -Lukas > > 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 > -- 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
