Date: Sat, 22 Jan 2000 23:56:03 +0100 From: Andreas Braukmann <braukmann@tse-online.de> To: current@freebsd.org Cc: msmith@freebsd.org Subject: Mylex AcceleRAID 250 Message-ID: <20000122235603.C69151@cage.tse-online.de>
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Hi Mike,
... today I tried to build our first Mylex-RAID based FreeBSD-system.
Hardware (if you need any more details, just feel free to ask):
Gigabyte Dual PPro Board, Natoma, 2*PPro/200
dual channel SymbiosLogic SCSI-Hostadapter (BIOS deactivated),
- no disks
- just one CD-ROM on the first channel
Mylex AcceleRAID 250/8MB ECC-Cache
- EzAssist 1.00-16
- Controller 0: DAC960PTL1, FW V4.07-29
- 8 GB BIOS translation
- 3 * IBM DNES DNES-309170W
- RAID-5, 2 logical disks
FreeBSD 4.0-current snapshot 20000103
The installation (over nfs) went very well.
I sliced and labeled just the mlxd0.
mlxd0s1 was set bootable and I've chosen to install a standard mbr.
On Reboot I just get an 'missing operating system'.
If I boot from the install floppies again, the RAID-volume ist detected
fine.
Do you have any hints on what to try next?
As I am talking to you yet in any case, I would like to ask you
what cache-size to choose. Is it really advisable to stuff the
full 64 MByte onto the controller? Where lies the 'sweet-spot'
on the cache-size/performance curve?
Kind regards and thanks in advance,
Andreas
P.S. Thanks for this very valuable driver. We're now able to support
RAID-configurations even in a 'small-server' setup.
The AccelRaid 250 is about $500 in Germany, very affordable
compared to a full-blown SCSI2SCSI CMD5440 or the like.
--
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