I use a ZFS array for backups. The data is first copied to this array, and later copied to tape. This post contains some information which might be useful should I need to replace one of the drives in the array.
We have 10 HDD in this system.
Two are used in a gmirror for […]

I’m about to double the RAM in my ZFS system. It will go from 4GB to 8GB.
Right now, I have:

real memory = 4294967296 (4096 MB)
avail memory = 4100382720 (3910 MB)

I’m not interested in any big extensive benchmarks. I just want something simple. Hence:

$ cd /storage/bonnie/
[dan@kraken:/storage/bonnie] $ ls -l
total 0
[dan@kraken:/storage/bonnie] $ […]

For the record, I was doing a copy within a system recently:

# time zfs send storage/bacula@transfer | mbuffer | zfs receive storage/compressed/bacula-buffer
in @ 0.0 kB/s, out @ 0.0 kB/s, 4394 GB total, buffer 100% fullll
summary: 4394 GByte in 35 h 11 min 35.5 MB/s

real 2111m18.302s
user 11m44.831s
sys […]

I am impressed…. my gmirror array continued to work even after the drives were renamed from da20 and da24 to ada0 and ada1. This happened when I tried out the ahci(4) for my SATA drives.
It’s the type of thing I’m striving for soon in my ZFS array.
All this started when I wanted […]

From this morning’s log after a weekend power failure:

Mar 15 09:15:45 subie kernel: GEOM_MIRROR: Device gm0: rebuilding provider ad8 finished.
Mar 15 09:20:58 subie fsck: /dev/mirror/gm0s1f: UNREF FILE I=35 OWNER=root MODE=100400
Mar 15 09:20:58 subie fsck: /dev/mirror/gm0s1f: SIZE=151568652480 MTIME=Mar 13 16:03 2010 (CLEARED)
Mar 15 09:20:58 subie fsck: /dev/mirror/gm0s1f: UNREF FILE I=15356429 OWNER=dan MODE=100644
Mar 15 […]

I thought I’d run some simple tests, based on a tuning thread I found:

# dd if=/dev/urandom of=./file1 bs=1m count=1024
1024+0 records in
1024+0 records out
1073741824 bytes transferred in 14.283206 secs (75175127 bytes/sec)

And while the above was running:

# zpool iostat 5
capacity […]

Tonight’s goals:

Install a second HDD
get gmirror running
install the remaining 5×2TB HDD
add the two RAID cards

After adding in the second HDD for the OS, dmesg shows this:

ad4: 76319MB <seagate ST380815AS 4.AAB> at ata2-master UDMA100 SATA 3Gb/s
acd0: DVDR <tsstcorp CDDVDW SH-S223C/SB01> at ata3-master UDMA100 SATA 1.5Gb/s
ad8: 152587MB <wdc WD1600AAJS-75M0A0 02.03E02> at ata4-master UDMA100 SATA 3Gb/s

The following shows […]

Interesting posts here on ZFS tuning, espcially posts #34 and #35.
Post #37 has an interesting perl solution.