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marpanet

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Raid 5 to Raid 1 without loosing information..

we have a Dell PowerEdge R710 that has a PERC H700, it has to virtual drives, the first one is OK in Raid 1 with two physical disks, but the second one is configured (I don´t know why) as Raid 5 but it only has two disks 600gb each, I know you need three disk so Raid 5 can work, so it is saying that we have a Degrated virtual drive...

If you into the configuration of the Raid, it says that we have one missing drive, we need to purchase another physical drive to be able to have the virtual disk in Raid 5.

The virtual disk is supposed to be 1,200GB, but we only have 600GB because it hasent been able to run in Raid 5, so, my question is the following:

Is it running on Raid 1 now until we insert another 600Gb disk?
Can I change it to Raid 1 instead of Raid 5 withouth loosing anything?

Best regards,
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rindi
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No. because your RAID5 usable capacity is 2 x disk size, RAID1 capacity is  1 x disk size.
Now, you could do a backup & restore onto a RAID0, but I don't advise that due to risk of data loss.
" but we only have 600GB": How have you determined this?

As others suggest, it sounded as if you had RAID 5 and one disk failed.  But... .if this were the case, you'd still see 1,200G capacity.
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marpanet

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I think that the RAID 5 was working fine, but, they replaced that disk with one of 300GB, instead of 600GB, so the RAID marked as a drive missing because it can´t use the one with 300GB(I think). That´s the only explanation I can think of.... I know if you try to set up a RAID 5 with two disks it won´t let you from the start...

We are buying a 600GB so we can complete the RAID 5 again, Will it have a one disk failure tolerance?

Best regards,
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Marpanet - your data is already at risk, and you could have already encountered data loss.  RAID5 does not always protect against data loss when you lose a disk drive.  One unreadable block on any of the surviving disks is all it takes.

If data loss is unacceptable, consider going to RAID6, which means that there are dual parity blocks, so you have twice the protection. Your controller supports that RAID level also.
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RAID 1 in my point of view is always better than RAID 5. It is easier to setup and maintain, and failures are usually easier to repair.
Thank you for the information and tips.. Now everything is working fine.. Backups is the key..