One Terabyte
1TB Caviar should be 1024 gigabytes.
fdisk
hendry@i7 ~$ sudo fdisk -l /dev/sdb
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xdd67f844
Device Boot Start End Blocks Id System
/dev/sdb1 1 121601 976760001 83 Linux
hendry@i7 ~$ cat /proc/partitions | grep sdb
8 16 976762584 sdb
8 17 976760001 sdb1
XFS
/dev/sdb1 on /mnt/home type xfs (rw)
/dev/sdb1 932G 4.2M 932G 1% /mnt/home
Totally gut feeling iotop -b
with a sudo rsync -art /home/ /mnt/home/
Total DISK READ: 54.97 M/s | Total DISK WRITE: 56.83 M/s
Seemed like it was quite a good rate from the /dev/sda4 on /home type ext4 (rw)
.
reiserfs
/dev/sdb1 on /mnt/home type reiserfs (rw)
/dev/sdb1 932G 33M 932G 1% /mnt/home
hendry@i7 ~$ iotop -b | grep Total
Total DISK READ: 16.22 M/s | Total DISK WRITE: 11.08 M/s
Total DISK READ: 14.20 M/s | Total DISK WRITE: 9.05 M/s
Total DISK READ: 14.89 M/s | Total DISK WRITE: 4.66 M/s
Total DISK READ: 43.21 M/s | Total DISK WRITE: 39.24 M/s
Total DISK READ: 31.01 M/s | Total DISK WRITE: 1994.15 K/s
Bit all over the place during the rsync
. This could be my fault.
ext3
Er, wtf? Only 871GB availible from 1024GB?? 153GB has gone missing! 61GB has gone missing compared to xfs/reiserfs!!
/dev/sdb1 on /mnt/home type ext3 (rw)
/dev/sdb1 917G 200M 871G 1% /mnt/home
And there is nothing on the damn disk. Wtf is that 200M all about?
Quite a stable-ish:
Total DISK READ: 48.16 M/s | Total DISK WRITE: 45.55 M/s
ext4
/dev/sdb1 on /mnt/home type ext4 (rw)
/dev/sdb1 917G 200M 871G 1% /mnt/home
Maybe better performance than ext3. Hard to tell.
Total DISK READ: 56.90 M/s | Total DISK WRITE: 56.94 M/s
ext2
/dev/sdb1 917G 72M 871G 1% /mnt/home
Funny notes
Surprisingly sudo cp -r /home/ /mnt/home/
seemed slower than sudo rsync -art /home/ /mnt/home/
. Wtf is up with that? I think rsync cleverly launches
threads to speed up it's checksumming operation.
I just took a random iotop
reading which I thought was representative of the
transfer rates I was seeing.
For more details on the hardware please view Linux i7 rig.
Tried out xfs
So two disks with the same data from a sudo rsync --delete -art /home/ /mnt/home/
.
/dev/sda4 130G 90G 35G 73% /home
/dev/sdb1 932G 99G 833G 11% /mnt/home
Ummm, wtf does the xfs drive take 10% more?