Date: Thu, 28 Mar 2002 23:35:01 +0100 (CET) From: Lukas Ertl <l.ertl@univie.ac.at> To: "Kenneth D. Merry" <ken@kdm.org> Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: ciss driver and tagged queuing Message-ID: <20020328232901.L214-100000@korben.in.tern> In-Reply-To: <20020328152644.A23074@panzer.kdm.org>
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On Thu, 28 Mar 2002, Kenneth D. Merry wrote: > What RAID level are you using? There are significant differences (on the > smart array controller at least) between the block read and write results= =2E > With the SCSI->IDE controller, oddly, the write results are faster than t= he > read results. RAID5. I don't have a lot of experience with RAID, so I don't know if the number of disks have an influence on the result (12 80GB IDE disks in the SCSI/IDE array, 8 72GB disks in the Compaq array). > What does dmesg say about the card? From looking at the driver, it looks > like the "max outstanding commands" value that is printed out on boot wil= l > tell us how many outstanding transactions the card claims to support. Ok: ciss1: <Compaq Smart Array 5300> port 0x3000-0x30ff mem 0xf7e00000-0xf7efffff,0x f7fc0000-0xf7ffffff irq 3 at device 4.0 on pci7 ciss1: using 256 of 1024 available commands ciss1: 1 logical drive configured ciss1: firmware 1.76 ciss1: 2 SCSI channels ciss1: signature 'CISS' ciss1: valence 1 ciss1: supported I/O methods 0xe<simple,performant,MEMQ> ciss1: active I/O method 0x3<simple> ciss1: 4G page base 0x00000000 ciss1: interrupt coalesce delay 1000us ciss1: interrupt coalesce count 0 ciss1: max outstanding commands 1024 ciss1: bus types 0x2<ultra3> ciss1: server name '' ciss1: heartbeat 0x20000022 ciss1: 1 logical drive ciss1: logical drive 0: RAID 5, 416768MB online regards, le --=20 Lukas Ertl eMail: l.ertl@univie.ac.at UNIX-Systemadministrator Tel.: (+43 1) 4277-14073 Zentraler Informatikdienst (ZID) Fax.: (+43 1) 4277-9140 der Universit=E4t Wien http://mailbox.univie.ac.at/~le/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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