RE: RAID 5 performance problems

From: Jonathan Vardy (jonathan@explainerdc.com)
Date: Fri Apr 04 2003 - 10:05:56 EST


> From: Ezra Nugroho [mailto:ezran@goshen.edu]

> Your hdc is still running at udma(33). This is also part of the raid,
> right? This will slow the whole thing down since in raid 5
> write is done
> to all disks simultaneously. Before the system finishes writing to the
> slow drive, the write is not done yet.

> Your hdc is still running at udma(33). This is also part of the raid,
> right? This will slow the whole thing down since in raid 5
> write is done
> to all disks simultaneously. Before the system finishes writing to the
> slow drive, the write is not done yet.

This should not cripple the performance to what I get. My friend had
6x80GB 5400rpm drives with two of those on udma33 and four on udma66 and
he managed 80MB/sec (dual 500Mhz)

Jonathan
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Mon Apr 07 2003 - 22:00:23 EST