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You could use measurement tools, for example:
dd if=/dev/sda of=/dev/null
and in the meanwhile, measure the speed using iostat:
iostat -x /dev/sda -kt 5
(-x device -Kilobyte -refresh every 5 seconds)
The stats in /proc show what's the bus speed, which is nice, but not
very usefull (you know your max speed).
Ez.
Michael Ben-Nes wrote:
Hi All
I use raid 1 with:
Mylex AcceleRadi 170 that support U160
One HD is IBM 18GB U160
the second HD is Maxtor 36 GB U320.
Under proc i read: Wide Synchronous at 40 MB/sec
How do i know if they work at their max rate ( 160 ) ?
[EMAIL PROTECTED] c0]# cat current_status
***** DAC960 RAID Driver Version 2.4.11 of 11 October 2001 *****
Copyright 1998-2001 by Leonard N. Zubkoff <[EMAIL PROTECTED]>
Configuring Mylex AcceleRAID 170 PCI RAID Controller
Firmware Version: 6.00-01, Channels: 1, Memory Size: 32MB
PCI Bus: 2, Device: 13, Function: 1, I/O Address: Unassigned
PCI Address: 0xEF000000 mapped at 0xF8800000, IRQ Channel: 12
Controller Queue Depth: 512, Maximum Blocks per Command: 2048
Driver Queue Depth: 511, Scatter/Gather Limit: 128 of 257 Segments
Physical Devices:
0:1 Vendor: MAXTOR Model: ATLAS10K4_36SCA Revision: DFV0
Wide Synchronous at 40 MB/sec
Serial Number: B2T73CNM
Disk Status: Online, 35807232 blocks
0:2 Vendor: IBM Model: DDYS-T18350M Revision: SA2A
Wide Synchronous at 40 MB/sec
Serial Number: UED29146
Disk Status: Online, 35807232 blocks
0:7 Vendor: MYLEX Model: AcceleRAID 170 Revision: 0600
Wide Synchronous at 160 MB/sec
Serial Number:
Logical Drives:
/dev/rd/c0d0: RAID-1, Online, 35807232 blocks
Logical Device Initialized, BIOS Geometry: 255/63
Stripe Size: 64KB, Segment Size: 8KB
Read Cache Disabled, Write Cache Disabled
No Rebuild or Consistency Check in Progress
Bye
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- Re: Linux, Raid and how do I know the speed Ez-Aton
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