You are arguing performance in favor of a userspace kludge that doesn't stripe across disks?
Do you expect every program that writes files to be modified to support some fuse ioctl() for passing checksums to the underlying storage? That's what the ECC memory is for. Filesystems are supposed...
I did a little reading about "snapshot RAID", and it seems to me that a redundant storage system that only becomes redundant after a cron job runs is a fundamentally flawed idea.
Furthermore, I don't see how online capacity expansion is that important. If you're doing upgrades on your file...
S3 suspend.
It sounds like you are using S1 suspend. Try to change it in your BIOS settings.
If you feel like starting from scratch, reboot. But this shouldn't really be necessary very often. If it is, there is something wrong with your computer. Stop using Windows XP and/or get more than...
Not worth it. You can get an Ivy Bridge CPU, mobo, and RAM for just over $300 if you have a Microcenter nearby, and it will be twice as fast and use less electricity.
Why is this a problem? You should be using S3 suspend. Shuts off all the fans and takes power consumption down to a couple watts. Then when you whack the space bar, it comes up in three seconds with whatever applications you were using in the exact same states they were in before.
The only...
ZFS on FreeNAS or FreeBSD. Use RAID Z1 or Z2 (like RAID 6). It has checksumming and you can schedule scrubbing to go through and verify the checksums. Btrfs has similar features on Linux, but I wouldn't trust it yet.
The speed will not be a problem. Any modern CPU can do parity calculations...
Avoid Sandforce. Their controllers compress data to get the performance they claim, which is absolutely useless with encrypted data. Obviously, you should be be using luks on your root partition.
I was not able to find any information as to what the chipset is. If you do:
Atheros: Good open source support, 99% of cards work with Linux, supports injection.
Intel: Nearly as good as Atheros, but may not support injection.
Broadcom: Works only if you get lucky, may support injection...
It's just plain sill to turn a desktop computer off for any reason other than hardware changes, transport, or disconnection from power (ex. the batteries in your UPS are about to die). You get 95% of the power savings with S3 suspend, and you don't lose what you were doing or have to wait 40...
Use 5400 RPM for a file server/backup/etc. A RAID 5 array will usually be faster than whatever you're backing up even with 5400 RPM drives. The extra cost of 7200 RPM and enterprise RAID drives is not worth it (unless you are using a hardware RAID controller, which would be dumb).
You should sync all the file systems on the array and remount them read-only before doing anything, so as to ensure that you get the image in a consistent state.
Connect the target disk to some other machine a fat pipe to the server, and do this:
root@host~$ ssh root@server "cat...
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