- Joined
- May 17, 2014
- Messages
- 3,611
I just got my Seagate Archive 8TB SMR, (Shingled Magnetic Recording), drive.
Here is my setup;
Source system:
I made the copy with "rsync" crossing mount points, which at end said it averaged 33MB per
second :-(. Oh, well. Was not planning on any other use except backing up my FreeNAS.
One thing I think could have helped is TRIM / DISCARD support in the Seagate SMR drive. If
the drive knew what was not in use, then their would be less need to move data around. Since
ZFS supports TRIM / DISCARD, as well as COW, (Copy On Write), these SMR drives could
really work well for ZFS writes.
Note that I REALLY wanted to use a checksumming file system like ZFS or BTRFS for this SMR
drive. That way I have a chance to detect bad data caused by firmware bugs. So as part of my
backup routine, I'll run a scrub before I start the next backup.
Here is my setup;
Source system:
- FreeNAS Mini
- 4 x 4TB WD Reds in RAID-Z2
- Backups only
- eSATA port on FreeNAS Mini
- eSATA enclosure
- Seagate Archive 8TB SMR drive as own ZFS pool
I made the copy with "rsync" crossing mount points, which at end said it averaged 33MB per
second :-(. Oh, well. Was not planning on any other use except backing up my FreeNAS.
One thing I think could have helped is TRIM / DISCARD support in the Seagate SMR drive. If
the drive knew what was not in use, then their would be less need to move data around. Since
ZFS supports TRIM / DISCARD, as well as COW, (Copy On Write), these SMR drives could
really work well for ZFS writes.
Note that I REALLY wanted to use a checksumming file system like ZFS or BTRFS for this SMR
drive. That way I have a chance to detect bad data caused by firmware bugs. So as part of my
backup routine, I'll run a scrub before I start the next backup.