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Mirrored volume sets

By Adriatico ·
I tried to extend a partition on a mirrored drive. The idea was to mirror that extension as well. Sounded good when I first thought it, but it doesn't seem to work. Can someone tell me if this even possible.

Bearing that in mind, I decided to try a different method. I broke the mirror set, extended the D drive on one of the newer drives, created a volume set with the other two, and tried to mirror the two volume sets.

Obviously I haven't been able to get that to work or I wouldn't be posting here.

Any ideas? Original 2 drives where identical in size, the newer 2 was also identical but a couple of mb bigger.

Thanks. (btw- i'm trying to do this with just NT, and not through the use of 3rd party stuff)

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Mirrored volume sets

by Nate from RI In reply to Mirrored volume sets

NT will only let you mirror one standard partition to another... you can't mix different levels of RAID. It would be nice though.

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Mirrored volume sets

by Adriatico In reply to Mirrored volume sets

thought so, cheers.

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Mirrored volume sets

by Adriatico In reply to Mirrored volume sets

thought so, cheers.

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Mirrored volume sets

by spiceman In reply to Mirrored volume sets

You cannot mirror volume sets. Your best bet is to use the 2 hard drives which are the same or similar size as mirrors of each other and then create a volume set (not really useful as no data redundancy). You can have RAID 5 which will save your data if one hard drive fails. But you need at least 3 hard drives for that excluding the mirror sets preferably.

Best mirroring requires 2 identical hard disks and 2 controllers so if either fail your system will still be running! It's more expensive. Ordinary backup of your data might be best if you have your programs and time is no factor for the re-install.

Another thing you can do is to ghost your boot and program HD onto a CD and if it fails you can always return to this CD state!

Good luck.

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Mirrored volume sets

by Adriatico In reply to Mirrored volume sets

thanks. i keep my drives mirrored to supplement my existing backup schedules. the only reason i wanted to extend the volume set was so that i could keep everything under the D$ share in my back up selections (i know - i'm lazy). i ended up doing two sets of mirrored drives instead and edited my existing backup selections.

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Mirrored volume sets

by Adriatico In reply to Mirrored volume sets

thanks. i keep my drives mirrored to supplement my existing backup schedules. the only reason i wanted to extend the volume set was so that i could keep everything under the D$ share in my back up selections (i know - i'm lazy). i ended up doing two sets of mirrored drives instead and edited my existing backup selections.

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Mirrored volume sets

by avachon In reply to Mirrored volume sets

Hi, as the second respondent suggests, you have 3 fault tolerance options in nt: disk mirroring, disk duplexing (mirroring with separate controllers) and disk striping with parity. Volume sets do not offer fault tolerance. You can extend volume sets, but only if they are on ntfs. A typical scenario is to mirror the system partition (boot files) and create a boot disk so nt will start from the mirrored partition if the first on fails (modify your boot.ini for this). Mirroring, of course, consumes 50% of your disk space so it can be expensive. As suggested, good backups may be a better answer. Hope this helps.

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Mirrored volume sets

by Adriatico In reply to Mirrored volume sets

thanks, as well.

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Mirrored volume sets

by Adriatico In reply to Mirrored volume sets

thanks, as well.

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