Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I have a couple of drives installed. A standard 7200rpm hard drive is reporting a link speed of 3 Gbps in dmesg. The Agility 3 SSD is reporting 1.5Gbps.

Using hdparm gives the following results:

Agility 3 SSD:
 Timing cached reads:   2420 MB in  2.00 seconds = 1210.77 MB/sec
 Timing buffered disk reads: 376 MB in  3.01 seconds = 124.84 MB/sec

Standard HD:
 Timing cached reads:   2236 MB in  2.00 seconds = 1118.90 MB/sec
 Timing buffered disk reads: 596 MB in  3.01 seconds = 198.20 MB/sec

So the OCZ Agility 3 SSD is way under-performing.

Does anyone know how to get the link speed up to 3Gbps?

Here is the stuff from dmesg for the SSD:

[    1.333084] ata3: SATA max UDMA/133 cmd 0xa400 ctl 0xa800 bmdma 0xb400 irq 21
[    1.800036] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[    1.824526] ata3.00: ATA-8: OCZ-AGILITY3, 2.22, max UDMA/133
[    1.824530] ata3.00: 117231408 sectors, multi 16: LBA48 NCQ (depth 31/32)
[    1.856479] ata3.00: configured for UDMA/133
share|improve this question
Please provide some more information about the hardware (mainboard, SATA controller) and the BIOS configuration (IDE mode, AHCI, etc.). –  gertvdijk Nov 20 '12 at 0:09
In addition hdparms -I reports: ATA device, with non-removable media Model Number: OCZ-AGILITY3 Serial Number: OCZ-M8H4WBK88891D913 Firmware Revision: 2.22 Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0 –  T F Nov 20 '12 at 0:12
Mainboard is Gigabyte GA-M57SLI-S4. Using the onboard SATA ports. I couldn't see anywhere in the BIOS that mentioned AHCI –  T F Nov 20 '12 at 0:16
Just checked the Gigabyte website - this mainboard doesn't support AHCI. Is that a problem? The standard hard drive in there is linked at 3 Gbps.. –  T F Nov 20 '12 at 0:22
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.