On Fri, 2011-04-22 at 09:44 +0200, 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. I see * Data Set Management TRIM supported ... * Deterministic read after TRIM set on my devices. Thanks, Keith > 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
