Date: Wed, 17 May 2000 16:09:40 +0100 (BST) From: Mark Powell <M.S.Powell@salford.ac.uk> To: freebsd-scsi@freebsd.org Subject: Anyone successfully made a RAID 10 array on a DPT? Message-ID: <Pine.BSF.4.21.0005171336450.81228-100000@plato.salford.ac.uk>
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We have a machine with a DPT SmartRAID IV, with two channels, each with 3x18GB disks. I wanted to stripe the 3 disks across one channel and then mirror the whole lot on to the other channel, thus giving me ~54GB of storage in a RAID 10 array. I could the partition this to root, swap and the rest for data. I hit the old problem where you have to fiddle with the OS type in the DPTMGR. I've done this in the past when I've made RAID 0 arrays, to enable FBSD to see the array as one logical drive rather than individual disks. This was something DPT let me on to. However, this time I had to set the OS to something that would allow striped RAID 1 arrays. Most OS settings complain "the driver for this OS doesn't support software striped RAID 1 arrays." Setting to Windows NT or Dos, would allow the setup of the three RAID 1 arrays that appeared, under DPTMGR at least, as one ~54GB logical unit. Booting into FBSD showed three seperate drives. More worryingly, at bootup the DPT BIOS displays garbage characters when it would normally display the drives NAME, i.e. without the array it's ------ DPT SCSI BIOS v003.EN (1998/03/31) ... Controller: PM334UW v07M.0 Port:B010h IRQ:11 Drive: 0 (0,00,0) ..... Drive: 1 (0,01,0) ..... Drive: 2 (0,02,0) ..... CDROM: (0,06,0) ..... Drive: 3 (1,03,0) ..... Drive: 4 (1,04,0) ..... Drive: 5 (1,05,0) ..... ------ (I'm getting the (x,yy,x) from memory) However, after the array is configured it shows: ------ DPT SCSI BIOS v003.EN (1998/03/31) ... Controller: PM334UW v07M.0 Port:B010h IRQ:11 CDROM: (0,06,0) TEAC CD-ROM CD-532S Controller: CD-ROM CD-532S v1.0.A Port:0000h IRQ:00 Drive: 0 (0,00,0) <unprintable garbage chars here> ------ This looks like the controller is getting itself into some, for want of a better word, crappy state. Anyone actually made a RAID10 array successfully? Any ideas if this is possible? Cheers. Mark Powell - UNIX System Administrator - Clifford Whitworth Building A.I.S., University of Salford, Salford, Manchester, UK. Tel: +44 161 295 5936 Fax: +44 161 295 5888 www.pgp.com for PGP key M.S.Powell@salfrd.ac.uk (spell salford correctly to reply to me) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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