Date: Wed, 5 Aug 1998 12:43:04 +0800 (CST) From: Xia Hao <axis@prodigychina.com> To: aic7xxx@FreeBSD.ORG Subject: queue depth Message-ID: <Pine.LNX.3.96.980805123819.5395A-100000@demon.ProdigyChina.com> In-Reply-To: <Pine.LNX.3.96.980804141133.26154B-100000@co.numerix.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hi all, i'm using Linux 2.0.35, no scsi patch yet. i have one Seagate 32550W 2.1G HD and 4 Seagate 32171W all connected to a AHA2940UW adapter. I'm just wondering what the individual queue depths should be for each of these disks to achieve maximum random access performance while ensuring system stablity. Any clues? Axis SCSI Adapter: Adaptec AHA-294X Ultra SCSI host adapter Ultra Wide Controller PCI MMAPed I/O Base: 0xfebff000 Adaptec SCSI BIOS: Enabled IRQ: 9 SCBs: Active 0, Max Active 5, Allocated 30, HW 16, Page 255 Interrupts: 68304 BIOS Control Word: 0x18b6 Adapter Control Word: 0x0073 Extended Translation: Enabled Disconnect Enable Flags: 0xffff Ultra Enable Flags: 0xffc3 Tag Queue Enable Flags: 0x0000 Ordered Queue Tag Flags: 0x0000 Default Tag Queue Depth: 24 Tagged Queue By Device array for aic7xxx host instance 0: {255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255} Actual queue depth per device for aic7xxx host instance 0: {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1} To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe aic7xxx" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.LNX.3.96.980805123819.5395A-100000>