Forum Home
Press F1
 
Thread ID: 96551 2009-01-14 08:00:00 RAID Pre-Install Query justinsg (11165) Press F1
Post ID Timestamp Content User
738651 2009-01-14 08:00:00 I am planning to build a small low use home server from an old PC.

If I initially install a single 500gb HDD, can I later install another and config as RAID1 without losing data?

If so, can i then upgrade one of these disks to a higher capacity (say 1tb) still in RAID1 for a while/or until I buy another 1tb.

And if so, can i finally insert the second 1tb in and upgrade the RAID1 from max. size of 0.5tb to 1tb?

All without losing data :) :)
justinsg (11165)
738652 2009-01-14 08:23:00 You can set up a RAID set whenever you like and keep the data intact.
It always a good idea to do a backup before you start messing around with RAID though!

You can also change HDDs and keep the RAID going without losing data but not much point getting one bigger drive for a RAID1 set as you can only have the space of the smallest drive available.
It would be best to upgrade both HDDs at the same time.

Does this old PC have onboard RAID or are you going to put in a RAID card?
Wouldn't recommend using software RAID if you can help it.
CYaBro (73)
738653 2009-01-14 08:28:00 Welll... put it this way - the graphics card on my current motherboard was most likely KICKED or HAMMERED out so I'll be buying a new one anyway with RAID in built.

Thanks for the help - i'll make sure i backup
justinsg (11165)
738654 2009-01-14 08:35:00 err, i dont think sooooooo!.....cyabro, please explain how you move a single drive to a raid set keeping the data, unless of course you create the array on a set of disc's separate from the original! SolMiester (139)
738655 2009-01-14 09:30:00 err, i dont think sooooooo!.....cyabro, please explain how you move a single drive to a raid set keeping the data, unless of course you create the array on a set of disc's separate from the original!

Done it many times with RAID1. Not so sure about RAID0 or RAID5!
justinsg is talking about RAID1 anyway.

Have had PCs running a single HDD and they have wanted to change to RAID1.
Install the RAID drivers onto the existing O/S.
Install the 2nd drive.
Change BIOS settings to RAID.
Enter the RAID BIOS and configure RAID1.
It then asks if you want to keep the data on the source drive so I say "yes!"
It then reboots the machine and starts creating the mirror from the original data.
CYaBro (73)
738656 2009-01-14 19:23:00 Done it many times with RAID1. Not so sure about RAID0 or RAID5!
justinsg is talking about RAID1 anyway.

Have had PCs running a single HDD and they have wanted to change to RAID1.
Install the RAID drivers onto the existing O/S.
Install the 2nd drive.
Change BIOS settings to RAID.
Enter the RAID BIOS and configure RAID1.
It then asks if you want to keep the data on the source drive so I say "yes!"
It then reboots the machine and starts creating the mirror from the original data.

Well, I'll take your word for it but whenever I have created an array, it ALWAYS advises any data will be erased....
SolMiester (139)
738657 2009-01-14 22:00:00 it's kind of the point of raid 1 to be able to add or remove one of the drives without losing the data. raid 0 on the other hand - totally impossible. dugimodo (138)
738658 2009-01-14 22:11:00 it's kind of the point of raid 1 to be able to add or remove one of the drives without losing the data. raid 0 on the other hand - totally impossible.

Hi, I am well aware of the point of RAID thanks, however I was always under the belief the array had to be existing 1st, before you could add or remove.

I'm both surprised and impressed that you can build an array keeping the data, I will have to have a look and test this!
SolMiester (139)
738659 2009-01-14 23:00:00 I don't know enough about Raid configurations to comment but here is a cautionary tale:

hardware.slashdot.org

www.geek.com
zqwerty (97)
738660 2009-01-14 23:38:00 Yea RAID1 is only there as a backup for a HDD failure, nothing else.
Any virus, corruption, deletion etc will be mirrored to both discs so you need to have a seperate backup!
CYaBro (73)
1 2