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Raid 1 general question

post #1 of 12
Thread Starter 
im thinking about setting up a couple of 1tb drives in raid 1 just so i dont have to worry about doing backups all the time but since Raid 1 does real time mirroring it isnt really much good if i accidentally delete something etc. so i was wondering... if i set up my raid configuration and kept the second hard drive disconnected most of the time, but at the end every few days just plug it back in, would it automatically synchronize with the first drive? that way if i messed something up i wouldn't lose more than a couple of days work but since i dont really know much about raid because ive never looked into it before im not sure if it would work in practice. hopefully that made sense...

or if anybody can think of a way to delay the synchronisation of the drives by say.. 24 hours, that would be great

thanks thumb.gif
post #2 of 12
doesnt quite work like that.. it would screw up the RAID array that you would have to rebuild the array everytime you plug the the second drive back in. you would be better off for what you want to do is just have one drive and back up to the second drive periodcally as you desire smile.gif
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post #3 of 12
Yep, breaking the array is not a valid form of... whatever shadow copy. It sounds like you want some form of simple file replication with duplicates/version control?
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post #4 of 12
Thread Starter 
yeah i thought that might be the case. alright thanks mate!
post #5 of 12
Thread Starter 
not just file replication, something that will make an identical copy of the drive so i could even boot from it if i wanted to
post #6 of 12
If you plugged in the second drive it would automatically rebuild that second drive with the data on it from the first drive making the 2 drives identical.
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post #7 of 12
Quote:
Originally Posted by simoxiii View Post

yeah i thought that might be the case. alright thanks mate!

There's a key difference between backup software and a replicator though. Backup software usually compresses data so it is not available in a 1:1 state, or asap. You would have to have another system to retrieve, decompress the data etc, or do a restore process. Personally I use a replicator (karen's replicator) for my backups because I hate dealing with backup software.
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post #8 of 12
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

There's a key difference between backup software and a replicator though. Backup software usually compresses data so it is not available in a 1:1 state, or asap. You would have to have another system to retrieve, decompress the data etc, or do a restore process. Personally I use a replicator (karen's replicator) for my backups because I hate dealing with backup software.

so say my hard drive failed and i had used 'karens replicator' to back it up to another hard drive, could i then just plug in the hard drive with the backup on it and boot straight from it?
post #9 of 12
Quote:
Originally Posted by simoxiii View Post

Quote:
Originally Posted by tsm106 View Post

There's a key difference between backup software and a replicator though. Backup software usually compresses data so it is not available in a 1:1 state, or asap. You would have to have another system to retrieve, decompress the data etc, or do a restore process. Personally I use a replicator (karen's replicator) for my backups because I hate dealing with backup software.

so say my hard drive failed and i had used 'karens replicator' to back it up to another hard drive, could i then just plug in the hard drive with the backup on it and boot straight from it?

Tehnically no.. You're asking about two different things. One is a backup and one is about data redundancy. They are similar but definitely different. Wanting a drive that you can physically boot from that is identical to what you had is redundancy. Wanting backup copies of files of your data is well data backup.

Now it sounds like you want both of these things, thus you'll need both RAID array and data backup process.

Like I said about data backup, Karen's replicator is just simple data backup in a 1:1 format. It's not typically used a whole drive image, but I guess you could make it work if you used an imaged drive and just replicated non-OS files, ie. files that are not locked or in use but this is getting tangential and complicated.
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post #10 of 12
Thread Starter 
Quote:
Originally Posted by tsm106 View Post

Tehnically no.. You're asking about two different things. One is a backup and one is about data redundancy. They are similar but definitely different. Wanting a drive that you can physically boot from that is identical to what you had is redundancy. Wanting backup copies of files of your data is well data backup.
Now it sounds like you want both of these things, thus you'll need both RAID array and data backup process.
Like I said about data backup, Karen's replicator is just simple data backup in a 1:1 format. It's not typically used a whole drive image, but I guess you could make it work if you used an imaged drive and just replicated non-OS files, ie. files that are not locked or in use but this is getting tangential and complicated.

youre over analysing what im saying.... what i am trying to do is create an exact copy of my hard drive and put it onto another hard drive that i could boot from if i choose to. whether i use the word backup or redundancy, the point is still the same. if my drive fails or i delete something accidently, i want to be able to restore my first drive using the second drive to whenever i last decided to backup, copy, duplicate, shadow, or make my data redundant. whichever word you like to use.

thanks
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