Re: Miserable Disks

From: Charlotte Hammond <charlottejanehammond_at_yahoo.com>
Date: Wed, 24 May 2006 00:52:21 -0700 (PDT)
Message-ID: <20060524075221.65975.qmail@web34104.mail.mud.yahoo.com>

Hi All,

Some more details:

The filesystem is ext3 and it's on an EMC Clariion storage array (low-end SATA unit - don't know the exact model number), with fiber-channel connection.

The cache has been disabled due to problems with the UPS - I was assuming that this was part of the problem but couldn't account for all of it.

There are indeed several bad things happening:

• SATA disks
• RAID-5
• No cache

But even together I didn't expect things to be *this* bad. Am I looking for a non-existent fourth problem? :-) My current focus is on the 512-byte writes seen on iostat - any ideas why I could be seeing this?

Thanks
Charlotte

• Dennis Williams <oracledba.williams_at_gmail.com> wrote:

> Charlotte,
>
> Is this directly attached to the server or is it
> NAS?
>
> Dennis Williams
>

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Received on Wed May 24 2006 - 02:52:21 CDT