Maybe you guys can help me out.
I initially started with Ubuntu 10.04 (Spiderman) on a hacked ss4200 (Celeron 420 w/ 512 RAM) with 2x1TB WD Green EARS and 2x1TB WD GREEN EADS. I set up a software RAID 1 across the boot partition on 2 drives, and a software RAID 5 (64k chunk) across all drives. All filesystems are ext4.
I've upgraded to a DIY solution with Ubuntu 10.10 (Beast) and an Atom D510 1.66ghz w/ 4GB RAM, 5x2TB Samsung F4 drives. I put an old laptop drive in and the OS is installed to it. I've configured a software RAID 5 (64k chunk) across all 5 drives. It's finished syncing, and all file systems are ext4.
What I'm noticing is that Beast seems to be performing significantly worse on writes than Spiderman:
root@Spiderman:~# dd if=/dev/zero of=/media/checkit.file
6206255+0 records in
6206254+0 records out
3177602048 bytes (3.2 GB) copied, 40.4401 s, 78.6 MB/s
root@Beast:/storage# dd if=/dev/zero of=/storage/checkit.file
3044046+0 records in
3044046+0 records out
1558551552 bytes (1.6 GB) copied, 39.8188 s, 39.1 MB/s
I'm ruling out the processor as I think the Atom d510 far outperforms the Celeron 420, and more RAM is better than less RAM. The only other thing I can think of is the drives, but I've read reports that the F4s perform almost as well as 7200rpm drives of the same size.
Initial SMART disk checks are okay, and I'm running extended self diagnostics on them now.
What do you guys think?
I initially started with Ubuntu 10.04 (Spiderman) on a hacked ss4200 (Celeron 420 w/ 512 RAM) with 2x1TB WD Green EARS and 2x1TB WD GREEN EADS. I set up a software RAID 1 across the boot partition on 2 drives, and a software RAID 5 (64k chunk) across all drives. All filesystems are ext4.
I've upgraded to a DIY solution with Ubuntu 10.10 (Beast) and an Atom D510 1.66ghz w/ 4GB RAM, 5x2TB Samsung F4 drives. I put an old laptop drive in and the OS is installed to it. I've configured a software RAID 5 (64k chunk) across all 5 drives. It's finished syncing, and all file systems are ext4.
What I'm noticing is that Beast seems to be performing significantly worse on writes than Spiderman:
root@Spiderman:~# dd if=/dev/zero of=/media/checkit.file
6206255+0 records in
6206254+0 records out
3177602048 bytes (3.2 GB) copied, 40.4401 s, 78.6 MB/s
root@Beast:/storage# dd if=/dev/zero of=/storage/checkit.file
3044046+0 records in
3044046+0 records out
1558551552 bytes (1.6 GB) copied, 39.8188 s, 39.1 MB/s
I'm ruling out the processor as I think the Atom d510 far outperforms the Celeron 420, and more RAM is better than less RAM. The only other thing I can think of is the drives, but I've read reports that the F4s perform almost as well as 7200rpm drives of the same size.
Initial SMART disk checks are okay, and I'm running extended self diagnostics on them now.
What do you guys think?