SSD RunCore Pro IVはTRIM機能をサポートしていない(?)
Ubuntu 12.04にバージョンアップしたかったのは、以前にSSDに換装したため、10.04だとTRIM機能がないし・・と思っていたからなんだけど...
12.04を入れただけでは自動設定にはならないらしいというので、ちょっと調べてみると、もしかして対応していないのか?えっ、そんなことって
sudo hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: RunCore 32G-C SSD
Serial Number: ************
Firmware Revision: 2030S
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 62533296
LBA48 user addressable sectors: 62533296
Logical Sector size: 512 bytes
Physical Sector size: 512 bytes
device size with M = 1024*1024: 30533 MBytes
device size with M = 1000*1000: 32017 MBytes (32 GB)
cache/buffer size = unknown
Nominal Media Rotation Rate: Solid State Device
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 1 Current = 1
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 *udma5 udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
SET_MAX security extension
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART self-test
* General Purpose Logging feature set
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Integrity word not set (found 0x0000, expected 0x1ea5)
メーカーの商品特徴(参照)には
Garbage Collection機能内蔵でSSDの弱点であった速度劣化を防止。Trim処理が不要です。
とあったけど、「不要」って、TRIMをサポートしてないって意味なのかな???
sudo fstrim -v /
fstrim: /: FITRIM ioctl failed: サポートされていない操作です