Sata disk with 16 bit IO_support
Felipe Alfaro Solana
felipe.alfaro at gmail.com
Wed Sep 27 15:15:57 UTC 2006
On 9/27/06, Joan Tur <joantur at cancullet.org> wrote:
> Es Dimecres, 27 de Setembre de 2006 01:37, en Felipe Alfaro Solana va
> | On 9/26/06, Joan Tur <joantur at cancullet.org> wrote:
> | > Es Dimarts, 26 de Setembre de 2006 21:31, en Felipe Alfaro Solana va
> | > | On 9/26/06, Joan Tur <joantur at cancullet.org> wrote:
> | > | > Hallo!
> | > | >
> | > | > My brand new laptop (LG LW20) has got a 1,8" sata disk drive; I've
> | > | > installed Kubuntu 6.06.1 in it, and have noticed that IO_support
> | > | > 0 (16 bit), instead of 1 (32 bit).
> | > | >
> | > | > Running "hdparm -c1 /dev/sda" shows "HDIO_SET_32BIT failed:
> | > | > argument"
> | > |
> | > | AFAIK, most of the tunables of hdparm are useless for SATA
> | > | (only for PATA controllers). Anyways, you can be pretty sure you're
> | > | using 32-bit access, bus-master transfers to and from your hard
> | > | since almost all SATA controllers do support bus-master and are
> | > | on PCI or PCI-Express bus designs (not ISA).
> | >
> | > I think you're wright, as I get about 18MB/s transfer rates from
> | Is that a laptop SATA disk? 18MB/s seems a little bit slow for a SATA
> | drive.
> | I've a couple of desktop ATA100 disks that sustain transfers at about
> | 40MB/s and I've seen SATA disks getting into 50MB/s or even more.
> As mentioned above, it's a 1,8" sata drive (not even 2,5 nor 3,5") ;)
> So maybe 18MB/s are fine, aren't they? 8-?
Yeah! For such a small drive, 18MB/s is perfectly fine.
De nada :-)
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