Date: Wed, 29 Apr 1998 11:36:33 -0500 From: Dan Nelson <dnelson@emsphone.com> To: Johann Visagie <wjv@cityip.co.za>, techsupport@nordicdms.com Cc: questions@FreeBSD.ORG Subject: Re: DPT RAID controller support Message-ID: <19980429113633.A14441@emsphone.com> In-Reply-To: <E0yUTA4-0001Er-00@ns.cityip.co.za>; from "Johann Visagie" on Wed Apr 29 11:28:20 GMT 1998 References: <19980428215538430.AAA192@mail.nordicdms.com> <E0yUTA4-0001Er-00@ns.cityip.co.za>
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In the last episode (Apr 29), Johann Visagie said: > On the other hand, a DPT controller and a DPT casing form a good > all-in-one product, which in a sense offers a single point of > failure. I would like to hear the experiences of anyone who has done > SCSI-to-SCSI RAID under FreeBSD...? Apr 17 17:39:12 emssrv5 /kernel: ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 11 on pci0:18 Apr 17 17:39:12 emssrv5 /kernel: ahc0: aic7880 Wide Channel, SCSI Id=6, 16 SCBs Apr 17 17:39:12 emssrv5 /kernel: ahc0: target 3 Tagged Queuing Device Apr 17 17:39:12 emssrv5 /kernel: (ahc0:4:0): "StorComp RAID-7 7.02" type 0 fixed SCSI 2 Apr 17 17:39:12 emssrv5 /kernel: sd2(ahc0:4:0): Direct-Access 61440MB (125829120 512 byte sectors) Apr 17 17:39:13 emssrv5 /kernel: ahc0: target 5 Tagged Queuing Device Apr 17 17:39:13 emssrv5 /kernel: (ahc0:5:0): "StorComp RAID-7 7.02" type 0 fixed SCSI 2 Apr 17 17:39:13 emssrv5 /kernel: sd3(ahc0:5:0): Direct-Access 61440MB (125829120 512 byte sectors) Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/sd2e 62868440 43109184 14729782 75% /io1 /dev/sd3e 62864404 43567346 14267906 75% /io2 All I can say is, it works. FreeBSD sees two 60-gig SCSI drives. No special drivers needed at all. The external RAID unit hasn't gone down in months. If a drive goes bad, it brings a spare online, recreates the bad drive's data, and blinks an LED on the front panel. While it's recreating parity, we yank the bad drive out, and pop a new one in, which becomes the next hot-spare. All FreeBSD notices is a performance drop for 4 hours or so. The two 60-gig volumes are logical partitions from a 220-gig unit; the other 100 gig is a Netware partition mounted on another machine. -Dan Nelson dnelson@emsphone.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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