On Mon, May 12, 2008 at 09:27:13AM +0400, Andrey V. Elsukov wrote: > Jeremy Chadwick wrote: >> I believe NCQ is supported, assuming that your controller is operating >> in AHCI mode and your disk supports NCQ. This mainly applies to Intel >> ICHx controllers, but there are others which support it as well. >> There's also NCQ support in non-AHCI drivers like hptmv(4), rr232x(4), >> hptrr(4), and mpt(4) with SATA disks. > > No. ata(4) driver currently doesn't support/use NCQ.
Thanks for this information -- I had no idea! I'll add this to my Common Issues page, although it's not so much an "issue" but more so a feature. I was always under the impression that AHCI included automatic support for negotiation and use of extensions like NCQ and TCQ: http://en.wikipedia.org/wiki/Native_Command_Queuing http://www.seagate.com/content/docs/pdf/whitepaper/D2c_tech_paper_intc-stx_sata_ncq.pdf -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB | _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
