![]() If you delete your important doc in RAID it's gone immediately. If you have data that you need to be careful to keep available, I'd look first at backup strategy. For software raid, it can be a crapshoot unless you have a plan ahead of time. Many hardware controllers for RAID will have blinkies to warn you of drive giving problems. In other aying with RAID at home is fun and can be useful, but overall it won't gain you much unless you have a specific purpose behind it.Īnother thing to consider: if you're not using hardware RAID like 3ware's cards, you're going to have more difficulty figuring out which drive is dead unless you have a system in place for knowing that drive A is labeled, so when the RAID system you're using goes ploof you can figure out which physical drive is the issue and swap the RIGHT one. One link that I read before is found here discussing RAID 5 for small businesses (don't use it!). And with drive sizes increasing to ridiculously huge sizes this is more and more common, leading people to recommend RAID 10 or better if you're running servers that need to be available as much as possible and downplaying using RAID 5). You can't recover the volume because of that bad bit, undetected before, so your volume is hosed if you don't ALSO replace drive B and therefore ruin the RAID volume and then recover from a complete backup we had this happen to us with a Dell PERC-backed RAID 5. As the volume recovers data from A and B to rebuild C, the system discovers an unreadable spot on drive B. You slap in a new drive to replace drive C. Then set it up with mirroring.Īlso there are papers out there warning about the dangers of RAID (if you really want heavy-duty stuff) and large disks now, because as drives get bigger it's becoming more likely that you'll hit the point where you will have a drive failure in a cluster and not know it until you're trying to recover from a total drive failure (i.e., you have RAID 5 with three disks, a drive fails. It becomes a network appliance with a web interface for configuring it. ![]() If you're a home user just looking for some RAID setup for some important home data and not customer or business data, I'd look at getting a cheap computer with a couple large drives and turn it into a NAS device with something like FreeNAS. ![]() Many work fine, but some do have issues with this, since they're meant to be used for portability and not as a workhorse drive (people used to play with making older iPods into RAIDs and discovered the drives died sooner, also I've read of external drives that would try to power down at inopportune moments and have spin-up issues). If you have a controller failure you're going to have an availability issue.īeyond that there's consideration in that external hard drives often have things like power and heating issues if you're going to use them 24/7. This kind of depends on what you're trying to keep redundant and what degree of safety you want, and what exactly you're looking for in "safety" (just availability? Redundancy? Backup?)Īnd RAID doesn't help beyond drive failure. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |