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OK, why is it that the minute you take any kind of risk with irreplaceable data the worst always happens. I mean, just because I temporarily remove my backup hdd from my home office PC to add storage to my MCE PC surely isn't the signal for one of the disks in my Raid 0 stripe set to go belly up. Sheesh. You'd think that PC's have a mean streak and just wait around for an opportunity to bite. Oh well, it seems I lost the last few months of digital photos (not much really since most are still on my camera), seven years of Personal and Business financial and tax records (OUCH!), significant amounts of downloaded software (DOUBLE OUCH!), seven years of correspondence and email history (DOH!) and some home video footage including footage taken earlier this month on my trip to Thailand.
Well, after I repaired damaged furniture and swept up fragments of various broken desk ornaments strewn around the room, I resigned myself to my loss and ripped out the offending disks. I threw out the dead one (with gusto!) and assigned the other to my kids' PC as much needed storage space and went out and bought 2 brand spanking new Seagate 320Gig SATA's which I promptly set in Raid 1 (Don't say I don't learn!) It now seems that there was some small chance I may have been able to recover some data from the remaining disk of the broken array although the chances of getting much I would say are small.
The good news though is that I haven't used my video cam (JVC Everio 30Gig HDD) since I copied the footage to the PC although I have erased all of the files from the camera. With a little research I found a fairly handy little tool which (god willing) will allow me to unerase the HDD contents and retrieve my lost Thailand footage. Anyway, I will be installing this little baby on the weekend in the hope of extracting some precious memories but I thought I'd post a link here since this software is free and has some pretty good data recovery features. Enjoy...
Why RAID 0 anyway Phil? No redundancy there. RAID 0 is only useful to increase data transfer rates (large files stored over multple drives so can be accessed faster) at least that's my understanding.
When you rebuild go with RAID 1 at least. Same storage space, but with redundancy.
lol.... you used raid 0 to store data you would be sad to lose..... hehe.... youll know better for next time wont you
In fact there is no problem with using Raid 0. The only problem arises when you don't have a backup. As said, it seems amazing that as soon as I temporarily go without a backup the damn thing dies. C'est la vie I guess
Why RAID 0 anyway Phil? No redundancy there. RAID 0 is only useful to increase data transfer rates (large files stored over multple drives so can be accessed faster) at least that's my understanding.
Precisely, I used to do a lot of video editing and therefore I was accessing large files and wanted maximum transfer rates. This was working beautifully and it also did not waste any storege space. At that time I had no requirement for redundancy.
Quote:
Originally Posted by GlenR
When you rebuild go with RAID 1 at least. Same storage space, but with redundancy.
Unfortunately not so. If my understanding is correct Raid 1 is mirrored while Raid 0 is striped. This means you lose 50% of your storage space when you go Raid 1. None the less this is the route I have now taken since I now do much less editing. In addition, at the time I built my Raid 0 array the cost of 200Gb of effective storage with redundancy was too great to consider hence 2 x 100Gb HDD in Raid 0 = 200Gb. The fact is that I now have 320GB of effective disk space for far less cost and with redundancy built in. ...Progress I guess!
Unfortunately not so. If my understanding is correct Raid 1 is mirrored while Raid 0 is striped. This means you lose 50% of your storage space when you go Raid 1. None the less this is the route I have now taken since I now do much less editing. In addition, at the time I built my Raid 0 array the cost of 200Gb of effective storage with redundancy was too great to consider hence 2 x 100Gb HDD in Raid 0 = 200Gb. The fact is that I now have 320GB of effective disk space for far less cost and with redundancy built in. ...Progress I guess!
D'oh! You're right. RAID 1 offers effectively half (approx) the storage of RAID 0 for the same drives. What was I thinking. Still, with storage these days, you can do more with less.
D'oh! You're right. RAID 1 offers effectively half (approx) the storage of RAID 0 for the same drives. What was I thinking. Still, with storage these days, you can do more with less.
Very true. It's one of those catch 22's that you do less than you'd like when costs are prohibitive but in truth redundancy was not really on my radar. Data security was originally handled by periodical synchronisation with another HDD it's just that over time my focus got changed and my system didn't keep up. In the end what I lost is more of an annoyance than anything. Rebuilding this year's financial data took me about 2 hours with the help of data export from CBA Netbank so I'm not about to go slashing my wrists just yet. By the same token I'd rather have what I lost than not hence new redundancy and backup procedures are being put in place. I bought an 80Gb Notebook HDD in an external enclosure for daily backups so this gives me a bit more data security.
If you really want the data it could probably be recovered by a recovery centre in Sydney. Usually costs about $100 for a HDD if you supply an identical hdd for the transfer.
So....
whats it worth?
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D'oh! You're right. RAID 1 offers effectively half (approx) the storage of RAID 0 for the same drives. What was I thinking. Still, with storage these days, you can do more with less.
The other issue, and why (preferably offline) backups are so important is that RAID1 (or RAID-anything for that matter) offer no protection against accidental/mistaken/purposeful deletion of the wrong file. It will be dutifully deleted from both halves of the mirrorred pair. Or, which is where offline comes in, a lightening strike that smokes both halves plus the controller plus your USB-attached external hard drive with squillions of gigabytes on it.
I back my important stuff up to tape. Easy to grab and run out the door with in case of an emergency.
Dead Disk in Raid 0 Array... OUCH!
