Server Electronics Sorcerer
- Aug 5, 2013
Arwen is a she...
Sorry, your highness. It's those baggy, loose-fitting clothes you were wearing. :)Arwen is a she...
My Seagate 8TB SMR drive seems fine. I've done 5 x 1.2TB backups to it. First was
over-written due to FreeNAS pool version being higher than ZFS on Linux. But the
others are commulative, (since I have the space). Also, the scrubs, (at least one
before or after my backups), run fine.
The 8TB drive is put in a dual drive, hot-swap, eSATA enclosure with fan.
Do have some hot-swap problems getting FreeNAS to recognize this eSATA drive.
My procedure is getting better. Something about getting the drive spun up before
the eSATA cable is connected to the FreeNAS.
For my use, this 8TB SMR drive appears fine. It's not fast, get about 30MBps write
speed using "rsync" full copies. Reads up to 150MBps.
Yes. In some respects, I am using the drive as they were designed, "Archive".
Actually there is logic, it's just not explained in most of the documentation....
I do recall when I was simply testing them the performance went from 140mbps to 10-15 without any logic.
Those drives are SMR. Without special filesystem support (absent in ZFS) they may be quite slow on random write/rewrite patterns. I had no chance to test them in practice, but from theoretical knowledge I would avoid them, if possible.
So how are these 8TB Seagate Archive disks shaking out? Some of the original posters have had these now going on 6+ months.
I'm kicking around picking up 3 or 4 of these 8TB drives for a dedicated backup server. Drives would be setup as either RaidZ1 or RaidZ2.
3x 8TB RaidZ1 = 14.6TB (Est. $720)
4x 8TB RaidZ2 = 14.6TB (Est. $960)
Is the lack of TLER a show-stopper for using these with ZFS/RaidZ? I would be writing to these drives maybe a couple times per month when long-term backups run. I'm guessing that running RaidZ2 would lessen any negative effects of not having TLER as I could always just pull the drive that is hanging everything up and still have some redundancy, right?
The other alternative was to pick up two of the USB 3.0 8TB externally cased Archive drives and use those independently. However, being USB external drives, it would probably be difficult to run ZFS on them and even then, they would not correct errors when scrubbed (just recognize the error).