Re: DOSD, shadowing, HBVS minimerge

From: Keith A. Lewis (lewis_at_mazda.mitre.org)
Date: 12/31/03 

Date: Tue, 30 Dec 2003 23:14:40 +0000 (UTC)

helbig@astro.multiCLOTHESvax.de (Phillip Helbig---remove CLOTHES to reply) writes in article <bssroc$ab4$3@online.de> dated Tue, 30 Dec 2003 21:46:52 +0000 (UTC):
>Thus, perhaps instead of using two physical disks in a shadow set for
>DISK$SCRATCH, I could use two physical disks NOT in a shadow set. My
>idea is to define SYS$SCRATCH as a search list, hoping that if the first
>disk fails then the directory on the other disk would be used. I've
>never used a search list across more than one device, though. Is this
>possible?

Yes, a search list can span devices.

No, it won't do what you want. If a mounted disk which is part of a
searchlist goes into mountverify, any process attempting to read that disk
(as in "DIR SYS$SCRATCH") will hang. Processes which attempt to write to a
searchlist will always get the first disk in the list, so it doesn't change
anything there.

--Keith Lewis klewis {at} mitre.org
The above may not (yet) represent the opinions of my employer.

Relevant Pages

  • Re: Single-Threading / Performance issues
    ... Apparently not since at least 3 physical disks are required for RAID-5. ... This is normal but the percent disk utilization metric isn't much use ... might want to set SQL Server 'max server memory' if you have other apps ... > From Query Analyser, I run my import proc - which first copies data ...
    (microsoft.public.sqlserver.server)
  • Re: need help setting up resources
    ... Resources map to physical disks, so if there are several drive letters associated with multiple partitions on a single disk, they will show up as a single resource in the Cluster Management tool. ... If you add a disk later, you will need to adjust the SQL Server to be dependent on the new disk resource. ...
    (microsoft.public.sqlserver.clustering)
  • RE: Use FSMT on dynamic disks?
    ... we recommmend not to use such third-party application in cluster ... >>by it and still detects that it is not a physical disk. ... >>I could install all disks as physical disks with dual path disabled, ... >>I would have to backup and restore everything after the migration to ...
    (microsoft.public.windows.server.migration)
  • Re: Logical and Physical disk drives
    ... disk), would the partition help reduce the likelihood of OS ... Physical disks: ... helping with OS corruption? ...
    (microsoft.public.windowsxp.hardware)
  • Re: Logical and Physical disk drives
    ... disk), would the partition help reduce the likelihood of OS ... Physical disks: ... And a benefit of 2 drives is the heads can seek independent of each other thus making your system more efficient. ...
    (microsoft.public.windowsxp.hardware)