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- Path: sparky!uunet!cs.utexas.edu!uwm.edu!linac!att!ucbvax!ROWDI.LakeheadU.Ca!OCCHILL
- From: OCCHILL@ROWDI.LakeheadU.Ca (Geoff Hill)
- Newsgroups: comp.os.vms
- Subject: Striping and Shadowing
- Message-ID: <76FB3BE080600321@THINK2.LakeheadU.Ca>
- Date: 20 Jan 93 22:12:00 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 33
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- We are considering buying DEC's disk striping and/or shadowing
- software and would be interested in other people's experiences
- with these products. Our VMS environment will probably be
- a VAX 4000/100 with 4 (or possibly 5) SCSI disks.
-
- 1) Disk Striping:
- - how effective in improving disk I/O ?
- - how reliable is it ?
- - How easy is it to install and use ?
- - any disadvantages ?
-
- 2) Volume Shadowing:
- - how effective in improving disk I/O ?
- - how reliable is it ?
- - How easy is it to install and use ?
- - can you have more than one shadow volume ?
-
- 3) Mixture of 1 & 2:
-
- If both Disk Striping and Volume Shadowing are installed,
- e.g. a shadow set of 2 disks is striped across 2 other disks,
- - how easy is this to set up ?
- - would we get improved I/O from shadowed reads *plus*
- improved I/O from striped reads ?
-
- Will either of these products work with non-DEC drives ?
-
- Thanks.
-
- == Geoff Hill
-
-