Re: [PATCH] ata: Disable NCQ for Crucial M225 brand SSDs

From: Jarod Wilson
Date: Thu Jan 28 2010 - 15:19:20 EST

On Wed, Jan 27, 2010 at 11:14 AM, Vishal Rao <vishalrao@xxxxxxxxx> wrote:
> 2010/1/27 Jarod Wilson <jarod@xxxxxxxxxxxx>:
>> How to define a group gets... Messy. Just as a data point, my own
>> Barefoot-based SSD, an OCZ Vertex, has no NCQ-related problems
>> whatsoever, so far as I know. Its currently hooked to a Zotac ION
>> board, which has ahci-driven sata controllers of some sort, was
>> previously in a Dell Studio Hybrid, where it also worked just fine.
> Thanks for data point. I'm personally hoping for other Crucial users
> specifically.
> Is NCQ enabled - if you grep dmesg for ata ?

$ dmesg | grep -i ncq
ahci 0000:00:0b.0: flags: 64bit ncq sntf led pmp pio slum part sxs
ata1.00: 62533296 sectors, multi 16: LBA48 NCQ (depth 31/32), AA

> The kernel already appears to blacklist (disable NCQ for) OCZ
> SSD models with firmware version "02.10104".

Here's what I've got:

ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: ATA-7: OCZ-VERTEX 1275, 00.P97, max UDMA/133
ata1.00: 62533296 sectors, multi 16: LBA48 NCQ (depth 31/32), AA
ata1.00: configured for UDMA/133
scsi 0:0:0:0: Direct-Access ATA OCZ-VERTEX 1275 00.P PQ: 0 ANSI: 5

Jarod Wilson
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