I've measured resync on some slow IDE disks (*not* an X4500) at an average
of 20 MBytes/s. So if you have a 500 GByte drive, that would resync a 100%
full file system in about 7 hours versus 11 days for some other systems
My experience is that a set of 80% full 250 MB drives took a bit less
than 2 hours each to replace in a 4x raidz config. The majority of
space used was taken by large files (isos, music and movie files
(yes, I have teenagers)), although there's a large number of small files
as well. This makes for a performance of a bit less than 40 MB/sec
during resilvering. The system was pretty sluggish during this
operation, but it had only got 1GB of RAM, half of which
firefox wanted :-/.
This was build 55 of Nevada.
- Bart
--
Bart Smaalders Solaris Kernel Performance
[EMAIL PROTECTED] http://blogs.sun.com/barts
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