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Article #409RAID 5 vs duplexing
From: Tom Kustner
Date: Fri, 10 May 1996 00:00
Date: Fri, 10 May 1996 00:00
45 lines
2054 bytes
2054 bytes
I have done some research on this and drawn some conclusions (corrections welcome), but still have a few questions: Duplexing - Initially cheaper than RAID 5, but eventually more expensive (twice the drives) - Reads are faster because there are two disks to read from. - Hot-swappable capability exists. - Best if you care about uptime and performance RAID 5 - See above comments on duplexing. Cheaper for sites with lots of drives. - Dependent on one controller. - Best if you care about cost. - Proprietary (?) Questions: Are RAID 5 controllers slower, the same, or faster than, say, a normal Fast Wide SCSI-2 controller? Which one does writes faster, RAID 5 or duplexing? What is preferrable, the "software" protection of duplexing as done by NetWare, or the "hardware" protection as done by RAID 5, or are they the same? Is RAID 5 harder to manage than duplexing? Are there any disadvantages to RAID 5 I haven't listed? We are a Compaq environment and currently duplexing our current server. These questions are more for a new server we may be ordering from Compaq (Proliant 1500). Any comments on Compaq's RAID solutions or on their SmartArray controllers are welcome. Thanks for your help. ---------------------------------------------------------------------------- Tom Kustner Emjay Corporation System/LAN Administrator 725 W. Glendale Ave. Email: emjay@execpc.com Glendale, WI 53209-6509 USA Phone: (414) 961-0650 Fax #: (414) 961-1649 Any opinions are mine and not Emjay's.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fe659,6b2e5f577816a3a4,start X-Google-Attributes: gidfe659,public X-Google-Thread: f8bf7,6b2e5f577816a3a4,start X-Google-Attributes: gidf8bf7,public From: emjay@execpc.com (Tom Kustner) Subject: RAID 5 vs duplexing Date: 1996/05/10 Message-ID: <31938d64.16703900@news.execpc.com> X-Deja-AN: 154180194 organization: Emjay Corporation newsgroups: comp.os.netware.misc,bit.listserv.novell