Messages in this thread | | | From | Nicolas Turro <> | Subject | DAC960 and cache... | Date | Wed, 28 Aug 2002 14:55:34 +0200 |
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Hi,
I have a Mylex Acceleraid 170 Raid board and i use DAC960 RAID Driver Version 2.4.11 of 11 October 2001 under linux (kernel 2.4.18). Here is the cat /proc/rd/c0/current_status :
***** DAC960 RAID Driver Version 2.4.11 of 11 October 2001 ***** Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com> Configuring Mylex AcceleRAID 170 PCI RAID Controller Firmware Version: 6.00-15, Channels: 1, Memory Size: 32MB PCI Bus: 0, Device: 6, Function: 0, I/O Address: Unassigned PCI Address: 0xFC000000 mapped at 0xE0800000, IRQ Channel: 16 Controller Queue Depth: 512, Maximum Blocks per Command: 2048 Driver Queue Depth: 511, Scatter/Gather Limit: 128 of 257 Segments Physical Devices: 0:0 Vendor: QUANTUM Model: ATLAS10K3_36_SCA Revision: 020W Wide Synchronous at 160 MB/sec Serial Number: 344208142992 Disk Status: Online, 71798784 blocks 0:1 Vendor: QUANTUM Model: ATLAS10K3_36_SCA Revision: 020W Wide Synchronous at 160 MB/sec Serial Number: 344207749285 Disk Status: Online, 71798784 blocks 0:2 Vendor: QUANTUM Model: ATLAS10K3_36_SCA Revision: 020W Wide Synchronous at 160 MB/sec Serial Number: 344211046648 Disk Status: Online, 71798784 blocks 0:3 Vendor: QUANTUM Model: ATLAS10K3_36_SCA Revision: 020W Wide Synchronous at 160 MB/sec Serial Number: 344211046660 Disk Status: Online, 71798784 blocks 0:4 Vendor: QUANTUM Model: ATLAS10K2-TY184J Revision: DDD6 Wide Synchronous at 160 MB/sec Serial Number: 161034310612 Disk Status: Online, 35827712 blocks 0:5 Vendor: QUANTUM Model: ATLAS10K2-TY184J Revision: DDD6 Wide Synchronous at 160 MB/sec Serial Number: 161034412602 Disk Status: Online, 35827712 blocks 0:7 Vendor: MYLEX Model: AcceleRAID 170 Revision: 0600 Wide Synchronous at 160 MB/sec Serial Number: Logical Drives: /dev/rd/c0d0: RAID-6, Online, 107483136 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
as you see, both read and write cache are disabled. I don't manage to enable them... would you give me any clue ?
I also think my filesystem is slow : i used mke2fs -b 4096 -R stride=16 -i 16384 /dev/rd/c0d0p4 but i only get arround 5 Mo/s while doing a tar c KDE | dd of=/dev/null (KDE is a 715 Mo source/compilation tree of KDE) Do you have any clue on how to improve this performance (direct sequencial access on this disk using dd give me around 50 Mo/s)
Thx in advance for you help.
N. Turro - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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