Raid Mirror Question

namtrooper81 · Apr 1, 2014

I have a friend, with a machine with two physical drives.

Lets says the main drive, C: is 500Gb,
Second drive, D: is 1Tb.

Is it possible for him to for example buy a 3Tb drive, and partition the drive into 3 partitions, 500Gb, 1Tb and whatever else is left, and then mirror the main drive, C: and D: to the 3Tb's matching partitions (In size).

He has windows 7 professional and it would run software raid.

lonewolf7 · Apr 1, 2014

All I can say about RAID, that you will need same capacity drives. One 500GB and One 1TB drive will result in 1TB drive and not 1.5TB.

ss202sl · Apr 1, 2014

A mirrored riad set will utilize the entire drive(both drives), and the size of the mirror will be the capacity of the smallest drive.

namtrooper81 · Apr 1, 2014

lonewolf7 :

That would mean you choose the drives to mirror before you create the partitions correct?

ss202sl · Apr 1, 2014

You choose the drives. The RAID is created, and you can create partitions out of the space available to the raid.

TyrOd · Apr 1, 2014

A mirror(RAID1) is not for data loss protection, it's for maximizing uptime if 1 drive fails. What you want here is to backup to the 3Tb drive.

ss202sl · Apr 1, 2014

TyrOd :

Noooo. You want to back-up to an external drive, and keep the external drive at the office, or at home(away from the computer), except for when you're actually making backups. This will protect you against a total catastrophic event(fire, flood, earthquake, etc) that completely destroys the computer, and data. If you want a local copy of the backup, then create a backup on the local 3TB drive.

TyrOd · Apr 1, 2014

ss202sl :

Well I expected he should have a external backup already, but that was probably a bad assumption.
To eliminate any single point of failure he'll want BOTH, a local and off-site backup.

Having daily backups on a second drive in the system is better than no backup, but you're right, he'll need at least 1 more external backup and preferably another off-site like you suggested.

I guess he could pop that 3TB drive in a USB enclosure as well, but it would be cheaper to get an external drive.

namtrooper81 · Apr 2, 2014

TyrOd :

ss202sl :

Well I expected he should have a external backup already, but that was probably a bad assumption.
To eliminate any single point of failure he'll want BOTH, a local and off-site backup.

Having daily backups on a second drive in the system is better than no backup, but you're right, he'll need at least 1 more external backup and preferably another off-site like you suggested.

I guess he could pop that 3TB drive in a USB enclosure as well, but it would be cheaper to get an external drive.

This is a friend that I've warned before that he should prep his backups. Stubborn people (myself included sometimes) have to learn the hard way. He did.

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