I finally built a RAID5 system this week using an Acceleraid 250 and an
Intel AstorII chassis with 5 IBM 7200RPM LVD disks (no hot spare). I
don't have the bonnie numbers handy, but I do have the below which came
from a somewhat similar system running an Acceleraid 200 with 2 of the IBM
drives in a RAID1 config. In each system, system RAM is 256MB,
controller RAM is 8mb.
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
1024 3723 48.1 4875 5.7 3387 7.6 7782 95.6 16854 11.1 143.2 1.2
IIRC, the RAID5 numbers were considerably better...about 2x in the
output columns and about +10MB/s in the input columns, and a little more
than 2x in the seeks/s column. Since there's less to mirroring than
RAID5, I'm a bit puzzled by the relatively lousy write performance on the
RAID1. The disks should be capable of much more. The RAID5 system
is off right now...but here's the /proc/rd info from the RAID1.
***** DAC960 RAID Driver Version 2.2.4 of 23 August 1999 *****
Copyright 1998-1999 by Leonard N. Zubkoff <[EMAIL PROTECTED]>
Configuring Mylex DAC960PTL0 PCI RAID Controller
Firmware Version: 4.07-0-29, Channels: 1, Memory Size: 8MB
PCI Bus: 0, Device: 14, Function: 1, I/O Address: Unassigned
PCI Address: 0xF4800000 mapped at 0xD0009000, IRQ Channel: 10
Controller Queue Depth: 124, Maximum Blocks per Command: 128
Driver Queue Depth: 123, Maximum Scatter/Gather Segments: 33
Stripe Size: 64KB, Segment Size: 8KB, BIOS Geometry: 128/32
Physical Devices:
0:0 Vendor: IBM Model: DNES-309170W Revision: SA30
Serial Number: AJ0D2975
Disk Status: Online, 17915904 blocks
0:1 Vendor: IBM Model: DNES-309170W Revision: SA30
Serial Number: AJ0D4664
Disk Status: Online, 17915904 blocks
Logical Drives:
/dev/rd/c0d0: RAID-1, Online, 17915904 blocks, Write Thru
----------------------------------------------------------------------
Jon Lewis *[EMAIL PROTECTED]*| Spammers will be winnuked or
System Administrator | nestea'd...whatever it takes
Atlantic Net | to get the job done.
_________http://www.lewis.org/~jlewis/pgp for PGP public key__________
