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GeneralRe: Just realized that Virtual PC does not support USB... Pin
Dave Kreskowiak20-May-09 4:09
mveDave Kreskowiak20-May-09 4:09 
GeneralRe: Just realized that Virtual PC does not support USB... Pin
Michael Dunn20-May-09 8:28
sitebuilderMichael Dunn20-May-09 8:28 
GeneralRe: Just realized that Virtual PC does not support USB... Pin
Dave Kreskowiak20-May-09 13:27
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Questionwindows startUp Pin
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QuestionAudit "Seperation of Duties" Pin
Steve Ferrandino18-May-09 10:50
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QuestionWhat do RAID1 and RAID5 really mean? Pin
Jun Du15-May-09 7:23
Jun Du15-May-09 7:23 
AnswerRe: What do RAID1 and RAID5 really mean? Pin
Sebastian Schneider15-May-09 12:38
Sebastian Schneider15-May-09 12:38 
You can test disk mirroring by trashing one of the drives. If they are hot-swapable, just yank one out and put in a new, empty disk. The system will continue to operate during all this, though possibly slower than usual during the rebuild.

RAID-5 with three disks:
Basically, it writes 1 sector to disk 1, 1 sector to disk 2, then checksum of the two sectors to disc 3. The steps are repeated, but the checksum is always written to a different disk. That way, two disks are enough to rebuild the array, it does not matter which disk failed, AND it ofers speed advantages compared to RAID-1.

RAID as such does not offer failover. All disks are in use all the time. However, some RAID-cases have hot-standby-disks, which automatically replace failed ones, in order to keep the window of vulnerability as short as possible.
There also is no real data redundancy: If you accidentally delete something, its lost.

RAIDs only increase uptime and, to a certain amount, throughput.

And now my significant other has entered the room and ordered me to stop typing.

So long.

Cheers,
Sebastian

--
"If it was two men, the non-driver would have challenged the driver to simply crash through the gates. The macho image thing, you know." - Marc Clifton

QuestionHow to get machine certificate and user license. Pin
deadlyabbas12-May-09 20:59
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Questionerror code TF 220066 in VS 2008 Team Foundation server installation Pin
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QuestionIP of msn or yahoo chatter Pin
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QuestionOWA does not display properly. Pin
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QuestionForum suggestion [modified] Pin
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