Date: Thu, 24 Mar 2011 14:38:00 +0000 (UTC) From: Anton Yuzhaninov <citrin@citrin.ru> To: freebsd-questions@freebsd.org Subject: Re: how to enable NCQ on Intel ESB2 AHCI SATA?controller/ST31000340NS Message-ID: <imfl08$3co$1@dough.gmane.org> References: <im9tec$3a8$1@dough.gmane.org> <20110323213711.GH44561@dan.emsphone.com>
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On Wed, 23 Mar 2011 16:37:11 -0500, Dan Nelson wrote: DN> If you do a verbose boot, you should get a couple more lines printed: DN> DN> ahci0: Caps: 64bit NCQ SNTF AL CLO 3Gbps PM PMD SSC PSC 32cmd CCC EM 6ports DN> ahci0: Caps2: DN> ahci0: EM Caps: ALHD XMT SMB LED DN> DN> If you see NCQ in your Caps line, then queueing should be supported by the DN> controller. Looking at the ahci.c source, there is a quirk "AHCI_Q_NONCQ" DN> that disables NCQ, but it it only used for VIA VT8251 chips. It seems to be NCQ not supported by this controller: ahci0: AHCI v1.10 with 6 3Gbps ports, Port Multiplier supported ahci0: Caps: 64bit ALP AL 3Gbps PM SSC PSC 32cmd 6ports ahci0: Caps2: -- WBR, Anton Yuzhaninov
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