Messages in this thread | | | From | Mark Watts <> | Subject | mke2fs -j goes nuts on 3Ware 8506-4LP | Date | Wed, 28 Jul 2004 10:50:19 +0100 |
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I have a 3Ware 8506-4LP controller with 4 250GB Maxtor SATA drives, in a raid-5 configuration (64K blocks) System is: Dual Opteron 246 (2GHz) 2GB RAM Tyan S2875 motherboard
Kernel: 2.6.8-rc2 (pre-empt is ON) Rest of OS: Mandrake 10.0 AMD64 edition.
When I execute a mke2fs -j /dev/sda7 to format a 600GB partition on the raid as ext3, the system slows to a crawl.
Basically, the inode creation goes fine for the first 1000 nodes or so, then starts slowing to about 1 node per second.
According to 'top' the systems 'buffers' value is almost all my ram and both cpus are at almost 100% in I/O wait.
The system load will start to climb and it eventually hit ~15 before I got bored and rebotoed.
X is totally unresponsive although 'top' does refresh occasionally in a konsole.
I do understand that the 3Ware 8506 cards arent exactly stellar at raid-5 (we see ~22MB/sec write and upto 80MB/sec read if we're lucky) but surely a simple format of a filesystem shouldn't tie up the system like this?
Would a different card (3Ware 9500 series or LSI Logic MegaRAID) help here?
Cheers,
Mark.
P.S. As I write this, I'm doing an sa-learn (spamassassin) over 14k messages and the system is a little sluggish even though gkrellm is only showing ~1MB/sec on the 3Ware, so I'm guessing these are just pants cards in general. Periodically runnung 'sync' helps for a while but it fades again after that.
- -- Mark Watts Senior Systems Engineer QinetiQ Trusted Information Management Trusted Solutions and Services group GPG Public Key ID: 455420ED
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