Best eSATA JBOD? 210
redlandmover writes "I already have an HP Media Server (upgraded processor, and memory) that has already been upgraded internally to 3.5TB. I'm sure everyone already has their favorite backup solution (RAID, WHS, a billion external hard drives, etc). My question is: what is the best JBOD (Just a Bunch of Drives), eSATA-connected, external hard drive enclosure? (Preferably, at least 4 drives.)"
I stopped reading the summary (Score:1, Insightful)
Re:I stopped reading the summary (Score:4, Insightful)
RAID 1 + swapping out/rebuilding a mirror disk periodically is a perfectly reasonable backup solution.
Re:The best ESATA isn't really ESATA at all. (Score:5, Insightful)
You're better off with an SAS external enclosure and a SAS card with external connections. These can be expensive, but will pay for themselves quickly with the lack of extra management.
What management ? You get an eSATA chassis with a port multiplier, slot in some drives, and run a single cable to the eSATA port on the computer. "Management" doesn't even come into it.
It's a home media server. In what was is SAS even remotely justified ?
Re:I stopped reading the summary (Score:1, Insightful)
Except that your time to bring the backup/RAID1 mirror into sync with the primary RAID1 disk will be far longer than using something like rsync. Your fileserver will be slower because I/O will be flooded with the RAID sync process instead of the much shorter rsync.
Re:I stopped reading the summary (Score:5, Insightful)
You do know that a RAID can be used for STORING backups don't you? Making your primary storage a RAID is no substitute for a backup. Adding an offline RAID storage can be a backup.
Re:I stopped reading the summary (Score:4, Insightful)
Re:I stopped reading the summary (Score:2, Insightful)
after the cretin suggested that RAID was some sort of substitute for a backup.
RAID combined with a snapshotting system (Time Machine, VSS, ZFS, take your pick) can function as an excellent backup system. Not including off-site, obviously, but more than adequate for the typical home user.
I've never really looked into it, but I assume you can configure WHS to take regular VSS snapshots ?
Re:I stopped reading the summary (Score:2, Insightful)
yeah sure.
Let's say it again: Backups are:
- off-site
- offline
- multiple
- tested
anything else is just some kind of high-availability solution, that does NOT protect against catastrophic failure, fires, viruses...
Re:raid can help with backups (Score:3, Insightful)
He NEEDS another computer on his network.
With only one computer/disk controller if one of them fails, all FS might end up toasted.
He also needs incremental backups, just overwriting a snapshot of you data is no good when you realize that you have just overwritten your data with corrupted data because your main computing is failing slowly.
Re:I stopped reading the summary (Score:3, Insightful)
If you are rotating your swapped-out disks rather than continually using new blank ones, then the re-mirroring (if done vaguely intelligently) will only update based on the blocks that have changed since the last time that disk was running live in the array (i.e. an incremental update, which is much faster than re-mirroring from scratch).
Re:I stopped reading the summary (Score:3, Insightful)
I disagree, since a single mistake (e.g. mistakenly reformatting the wrong device node, or physically losing the system while moving house) could still take out the whole kaboodle.
And for something you really care about, an offsite backup is worth it and not difficult. I uploaded my family photos to my ISP-provided online file space. If you want to make sure it stays private, encrypt before uploading.
Old AT (pre-ATX) case (Score:2, Insightful)
Or, you can use one of those 4_3.5"_drives-in-3_5.25"_bays solutions if you need even more space and cooling capacity beyond what is already in your case. Even a small mid-tower case should support at least 6 drives using one of these.
Pick up a spare AT power supply while you are at it, and you will have a very reliable, well-cooled, very cheap solution.
Re:The best ESATA isn't really ESATA at all. (Score:1, Insightful)
I don't understand why people simply don't evaluate by doing something like this: 9999 x 4 = 10000 x 4 - (1 x 4) doing this in your head is much simpler than moving digits all around.
Re:I stopped reading the summary (Score:4, Insightful)
A single disk is more risky than I would like. Especially since it's offline, it can fail without warning leaving me (unknowingly) without a backup and unable to update my backup until I get a new disk (and hopefully I didn't need any of the archival versions of any of the files)
A RAID is far less likely to suffer that problem. When a disk fails, I have a signal that I should replace enough disks to maintain the RAID even when the remaining old disks fail.
And, as tsalmark said, it's nice when the backup disk is bigger than the primary.
Re:Wut (Score:1, Insightful)
Woah woah woah!
A) Don't blow a gasket there
B) Even in the wikipeida link you provide, they say "Some RAID controllers use JBOD to refer to configuring drives without RAID features. Each drive shows up separately in the OS. This JBOD is not the same as concatenation."
C) Again, don't blow a gasket. And you really shouldn't be randomly calling people a dipshit, that kind of makes you a dipshit.