corsair force 3 ssd : read/write conflict on big files like 250mb.

[bora]

hi all,

 

ubuntu 11.10

corsair force 3 ssd 1.3 firmware

you can find a detailed problem and disk info below. when i read or write big size files (like 256mb), some conflicts about reading. for example creating random file using "dd" command or while downloading or another copying bigsize file from to directory or media like usb stick, etc., there is no error occurs. However, when i check the checksum of the copied files, everytime i see different checksums.

 

I tried to control the checksum for crosscheck, unfortunately i found same broken result.

 

(checksum works well, if filesize is less then 256mb)

 

For instance you can see different checksum for the "v1.img" below:

 

birol@trax:~/Downloads$ uname -a

Linux trax 3.0.0-16-generic #28-Ubuntu SMP Fri Jan 27 17:44:39 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

 

birol@trax:~/Downloads$ ls -l v1.img

-rw-rw-r-- 1 birol birol 1796509184 2012-03-15 01:36 v1.img

 

birol@trax:~/Downloads$ md5sum v1.img

e8a2c652770a2da0fd93c981a79a8ba1 v1.img

birol@trax:~/Downloads$ md5sum -b v1.img

d692965aa21d43b40e7c6e821f721159 *v1.img

birol@trax:~/Downloads$ md5sum v1.img

baa9389d2ecfecf8d405a22565d1565b v1.img

birol@trax:~/Downloads$ md5sum v1.img

e683b1e5bba99dee3ecd35765f0fc368 v1.img

birol@trax:~/Downloads$ md5sum v1.img

ee0d31564b0a0508e83766c31fc18236 v1.img

birol@trax:~/Downloads$ md5sum v1.img

0c821ea3600f13c5b9d14fc12f329773 v1.img

 

 

hdparm -I /dev/sda result,

 

/dev/sda:

 

ATA device, with non-removable media

Model Number: Corsair Force 3 SSD

Serial Number: 11376506000010681665

Firmware Revision: 1.3

Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0

Standards:

Used: unknown (minor revision code 0x0110)

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: 117231408

LBA48 user addressable sectors: 117231408

Logical Sector size: 512 bytes

Physical Sector size: 512 bytes

Logical Sector-0 offset: 0 bytes

device size with M = 1024*1024: 57241 MBytes

device size with M = 1000*1000: 60022 MBytes (60 GB)

cache/buffer size = unknown

Nominal Media Rotation Rate: Solid State Device

Capabilities:

LBA, IORDY(can be disabled)

Queue depth: 32

Standby timer values: spec'd by Standard, no device specific minimum

R/W multiple sector transfer: Max = 16 Current = 16

Advanced power management level: 254

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

* NOP cmd

* DOWNLOAD_MICROCODE

* Advanced Power Management feature set

Power-Up In Standby feature set

* SET_FEATURES required to spinup after power up

* 48-bit Address feature set

* Mandatory FLUSH_CACHE

* FLUSH_CACHE_EXT

* SMART error logging

* SMART self-test

* General Purpose Logging feature set

* WRITE_{DMA|MULTIPLE}_FUA_EXT

* 64-bit World wide name

* IDLE_IMMEDIATE with UNLOAD

Write-Read-Verify feature set

* WRITE_UNCORRECTABLE_EXT command

* {READ,WRITE}_DMA_EXT_GPL commands

* Segmented DOWNLOAD_MICROCODE

* Gen1 signaling speed (1.5Gb/s)

* Gen2 signaling speed (3.0Gb/s)

* Gen3 signaling speed (6.0Gb/s)

* Native Command Queueing (NCQ)

* Host-initiated interface power management

* Phy event counters

* unknown 76[14]

* unknown 76[15]

* DMA Setup Auto-Activate optimization

Device-initiated interface power management

* Software settings preservation

* SMART Command Transport (SCT) feature set

* SCT Data Tables (AC5)

* DOWNLOAD MICROCODE DMA command

* SET MAX SETPASSWORD/UNLOCK DMA commands

* WRITE BUFFER DMA command

* READ BUFFER DMA command

* Data Set Management TRIM supported (limit 1 block)

* Deterministic read data after TRIM

Security:

Master password revision code = 65534

supported

not enabled

not locked

frozen

not expired: security count

not supported: enhanced erase

2min for SECURITY ERASE UNIT.

Logical Unit WWN Device Identifier: 0000000000000000

NAA : 0

IEEE OUI : 000000

Unique ID : 000000000

Checksum: correct

 

can you show me how i can figure out the solution?

best regards,

birol.