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On Thu, 6 Mar 2008, Ben Holland wrote: > Alright, I was going to say something about how RAID 0 just stripes with no > parody, a RAID 1 mirrors, so you get a whole drive of redundancy RAID 5 is > stripe with parody so you need 3 drives minimum. If you loose a RAID 0 you > lost half of your data, you can't recover from it, and chances are you lost > all of the other side as well because your file system is totally hosed > (though could someone please verify that). RAID 0 I have never seen to be > useful. Sorry for the lack of good news. ~Ben RAID 0 is striped, so not only do you lose half your data, you lose half of EACH FILE, so baring very special circumstances, you will have nothing left. However, RAID 0 is still very usefull - in our systems it is typically runs at about twice the speed of a single drive, which is nice for /tmp and /scratch, where permanent storage is not expected. We have applications that write very large intermediate files, and RAID 0 is a help. Daniel Feenberg > > On Thu, Mar 6, 2008 at 3:45 PM, Vince Kimball <[hidden email]> wrote: > >> I believe RAID 0 has no redundancy, so a single drive failure destroys >> the volume. >> >> Scott R. Ehrlich wrote: >>> I have a Dell PowerEdge 2950 with PERC 5/i, and 6 disks. Two disks >>> have one logical volume via a hardware RAID 1 and consist of CentOS 5 >>> 64-bit; the remaining four comprise a logical volume via a hardware >>> RAID 0, and is all user data. >>> >>> One drive on the RAID 0 went bad. I removed it while the system was >>> on, tried a reboot, and the system hangs at RedHat Linux... Starting >>> >>> I tried to boot from a Fedora 8 CD, which sees the boot drives fine, >>> but not the RAID 0 partitions. >>> >>> Visiting the PERC controller setup claims the RAID 0 volume is >>> unavailable, or something similar, though it is defined, with one of >>> the disks labelled as missing, since I removed it from the system. >>> >>> How do I get the partitions on the RAID 0 setup back? I have some of >>> the data, but need the rest, if possible, and the remaining three >>> disks appear physically healthy. I'm also going to work with Dell >>> for some answers, and I've done a lot of googling. >>> >>> Thanks. >>> >>> Scott >>> >> >> >> -- >> This message has been scanned for viruses and >> dangerous content by MailScanner, and is >> believed to be clean. >> >> _______________________________________________ >> Discuss mailing list >> [hidden email] >> http://lists.blu.org/mailman/listinfo/discuss >> > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > _______________________________________________ > Discuss mailing list > [hidden email] > http://lists.blu.org/mailman/listinfo/discuss >
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