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07-23-2012 05:44 PM  8 years ago
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RayJayJohnsonJr

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Computer question - Hard Disk Spanning and data retreval
I was running low on space on my main machine and was going to add more drives (RAID 1), but that was during the big floods and drive prices were ridiculous, so I grabbed an old machine and a few old drives, spanned them, and stuck my stuff on it. Now, months later, drive prices have receded and I'm ready to put in my RAID system except that one of the drives in my 'spanned drive' seems to have failed. Is there a way to get the remaining data off of the other drives, or am I completely hosed??
There, their and they're. It's really that simple.
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07-23-2012 06:06 PM  8 years ago
InvertedDude

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RayJayJohnsonJr
What RAID level did you use and how many hard drives in that RAID?
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07-23-2012 08:13 PM  8 years ago
RayJayJohnsonJr

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Read again. Not RAID. Spanned disks. OS is XP Pro. Was done thru Disk Management. 7 disks in 'spanned drive'.There, their and they're. It's really that simple.
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07-23-2012 08:27 PM  8 years ago
InvertedDude

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RayJayJohnsonJr
Read again. Not RAID. Spanned disks. OS is XP Pro. Was done thru Disk Management. 7 disks in 'spanned drive'.
So 7 drives into 1 spanned drive? Sounds like Raid O no fault tolerance. In a nut shell your screwed.

BUT this may be your answer...
Well it worked! I converted the Disk0 into a dynamic disk, rebooted and then added my 2nd drive. After I converted my 2nd drive to a dynamic disk, I selected my C drive partition on disk 0, right clicked it and selected mirror. It asked me for what drive and I selected the 2nd one. It is re-syncing now and is about 66% complete. I'll post the results tomorrow.

One thing to note though...I had two partitions and selected to mirror both before I left. I came back 3 hrs later and noticed it was only 25% completed because it was trying to write both partitions at the same time. Make sure to only do one at a time.
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07-24-2012 05:16 AM  8 years ago
jschenck

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sorry to say but if you lost a member in a spanned disk set you've lost your data. If you are really into digging around in a badly damaged file system you might be able to retrieve some of the data since a spanned file system is likely a 'concatenation' and not a strip set so it'll write on one disk until it's filled or some other criteria then move onto the next one. A striped set (RAID level 0) will definitely be unrecoverable.

But before giving up completely you might look at trying to fix the failed drive - if the data is important. Sometimes it's a failed electronics and not the physical drive. You can either buy the same model hard drive and swap the controller board on the hard drive or find a dealer that sells replacement logic boards. Make sure you don't disturb the remaining members of the concatenation set so you can recover the set once that member drive comes back online.
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07-25-2012 06:25 PM  8 years ago
djinni

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Why don't you try Acronis True Home 2012, PC Backup & Recovery. I use it every week to clone my main drive to a drive connected to a USB port. I've had 4 crashes over the last 7 years and Acronis saved me every time.

Get an external USB drive enclosure that supports your new large drive, connect it to your machine and use Acronis to clone your multiple spanned drives. Acronis should see your multiple spanned drives as one contiguous Drive Volume and will clone all your files including Boot Sectors to the new drive connected to the USB Port.
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07-25-2012 06:36 PM  8 years ago
ticedoff8

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Backing up after a drive crash kind of misses the point.
Acronis is nice - if you start using it before the drive fails.

Anyway:
2 things you can try:
1)
Build a new drive array - use a RAID5 or a RAID1+0 (RAID10).
Once the new array is ready, take the FAILED drive out of the RAID0 (spanned) array and put it in the freezer - yes, the freezer - for a day.
After a day in the freezer, take it out of the freezer, plug it back into the controller and spin it up.
QUICKLY, check to see if you can start copying data off the RAID0 array to the new RAID5 array. If you are quick, you might get most of the data before the bad disk heats up.

2)
Go to the surplus computer warehouse in you area and look for an exact replacement for the bad disk - same capacity, same brand, same model - etc.
Pull the controller board off the failed drive and replace it with the controller board from the drive you got from the surplus shop.
Be careful - but you can do it.
Plug the old drive with the replacement controller into the old array and spin it up.

Never use RAID0 (spanning) again. It is like using a Castle Creations product - a time bomb wait to go off.
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07-26-2012 04:31 AM  8 years ago
HotsHabit

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Raid0 has its place but data storage isn't its place. Raid0 is for speed and that's it, storage should be done on drives not striped.
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07-26-2012 05:16 AM  8 years ago
jschenck

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I have implemented RAID0 for data storage in critical datacenter servers. The key is those were set as a farm of read-only query/data retrieval engines sitting behind load balancers. when we lost a drive, which we did frequently, replace the spindle, recreate the RAID0 set and ftp on another copy of the data from the source system. Entire data retrieval system keeps running because fault tolerance was at the load balancer level, not at the system/compute node level. Of course the source system was setup with a fault tolerant file system, snapshots and backups to offsite media. RAID0 does have a place. Primary storage for data you care about is not for RAID0 - same with the concatenated set of drives. Unfortunately as you found out your chances for data loss go up exponentially since failure of the file system is based on the probability of any one of the member drives to fail.
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07-26-2012 08:33 AM  8 years ago
HotsHabit

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I have implemented RAID0 for data storage in critical datacenter servers. The key is those were set as a farm of read-only query/data retrieval engines sitting behind load balancers. when we lost a drive, which we did frequently, replace the spindle, recreate the RAID0 set and ftp on another copy of the data from the source system. Entire data retrieval system keeps running because fault tolerance was at the load balancer level, not at the system/compute node level. Of course the source system was setup with a fault tolerant file system, snapshots and backups to offsite media. RAID0 does have a place. Primary storage for data you care about is not for RAID0 - same with the concatenated set of drives. Unfortunately as you found out your chances for data loss go up exponentially since failure of the file system is based on the probability of any one of the member drives to fail.
Holy Buckets, you took an entire paragraph to say basically the same exact thing I said in less than 2 sentences. Your critical datacenter servers have absolutely no bearing at all on someones personal computing issue.

I find it easier for most people to keep things in layman's terms, if he was a major techie he wouldn't have been asking those questions here.
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07-26-2012 10:44 AM  8 years ago
RayJayJohnsonJr

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There, their and they're. It's really that simple.
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