[SunHELP] Disk Layout Issues...

[Mike's List]

Isn't the WD drives are IBM with WD label?  (WD = IBM drives?)


- Mike


On Tue, 16 Oct 2001, Fred Dikeman wrote:

> Hi David,
> We've been putting 40Gb disks in Ultra 5 & 10's on a regular basis for the
> last two years without a problem.  Just stay away from Western Digital
> drives. They work but they're a pain.
> 
> Fred Dikeman
> Data Instruments, Inc
> 
> 
> David Goldsobel wrote:
> 
> > Is it possible to put in a drive bigger than 20GB? According to the
> > folks at Sun my ultra 10 can only handle drives up to 20 GB? I would
> > love to know because I wanted to put up an FTP server and need more
> > storage.
> > Sorry to answer your question with a question
> > David
> >
> > -----Original Message-----
> > From: sunhelp-admin at sunhelp.org [mailto:sunhelp-admin at sunhelp.org] On
> > Behalf Of Michael Vang
> > Sent: Saturday, October 13, 2001 10:46 PM
> > To: sunhelp at sunhelp.org
> > Subject: [SunHELP] Disk Layout Issues...
> >
> > I'm assuming that having 2 disks versus 1 is better for a server
> > layout...
> >
> > Would having / on disk 1 and /export/home on disk 2 be best?
> >
> > Or is there another layout, possibly with SDS, that is better...
> >
> > I figure using 2 swap slices is a good idea, too...
> >
> > I have the opportunity to purchase either 1 80GB disk or 2 40GB disks
> > for my U5...
> >
> > I've already purchased the bracket for the 2nd disk, so I am leaning
> > towards the 2 disk approach...
> >
> > I looked into mirroring, but it looks like a hack on the U5...
> >
> > -----
> > When using Solstice DiskSuite 4.1 software, it is recommended that you
> > have a minimum of three metadevice databases to maintain a "quorum." It
> > is further recommended that the databases be maintained on different
> > disks, which would require three IDE hard drives in the system. Because
> > the Ultra 5 system can support only two hard drives, only two metadevice
> > databases are possible. This limitation has a known impact.
> >
> > Solstice DiskSuite software will function with only two disks and two
> > database replicas. However, if one disk fails, there is not a quorum. No
> > problem with the system will be seen until after the system is powered
> > down. After the system is powered down, it will not power on and boot in
> > multiuser mode without system administration intervention.
> >
> > For example, if the quorum is not seen during boot due to a hard drive
> > failure, the system boots in single-user mode. The problem is reported
> > by the system when the machine is rebooted. The output is similar to the
> > following example:
> > -----
> >
> > I'm worried too about the CMD PCIO646 IDE chip on the U5...
> >
> > http://www.cmd.com/ApplicationNotes/0646UDesignTips.pdf
> >
> > Apparently there are issues with DMA operation when both channels are
> > active...
> >
> > Any thoughts?
> >
> > Anyone have a U5 with 2 disks? How does it perform?
> >
> > This is for my new project: http://www.teamprimerib.com/freeshell.html
> >
> > Thanks!
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