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Currently I have 3 x Maxtor 81GB 5400RPM ATA100 drives and 3 x Maxtor 60GB
5400RPM ATA100 drives running off of two Promise PDC20267 cards. The disks
are all in one LV using LVM with ReiserFS. We're having this unique problem
where now if data is written to the LV, the cpu shoots up to 100% so we're
thinking there is a bad drive somewhere although all diagnostic information
is clean making the search extreamly difficult. Anyway, we're looking for a
RAID solution that will allow us to add disks on the fly without recreating
the entire raid. To my knowledge Linux RAID0 can't do it because of the
striping and Linux RAID5 still can't do it, but my information may be
incorrect. Can anyone lay down the facts for me?
If infact Linux RAID0 || 5 can't have drives added on the fly, I'm looking
at hardware RAID, possibly by using 3Ware cards. One of my questions about
3Ware cards is if it's possible to have 2+ cards full of devices and have
them all in one single RAID as opposed to having multiple raids. If 3Ware
can't do it, can promise do it with 2+ of their RAID controllers? How is
the support for both with linux?
Any help is appreciated.
TiA
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