Date: Sun, 21 Nov 1999 22:50:00 +0200 From: Iani Brankov <ian@bulinfo.net> To: Freebsd-questions <freebsd-questions@freebsd.org> Subject: Do I have NO FUTURE with vinum? Message-ID: <38385AF8.731806A9@bulinfo.net>
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Hi everybody, I have a big headaches with this 'evil'. I configured a two disk striped volume, but it performs much slower than I expected. The read performance - ~20MB/s is ok, but in writing it's ~4MB/s. Both the separate disks are much faster than the stripped volume, configured onto them. My machine is PII/350MHz with an Intel BX board, 64MB RAM, Intel EtherExpress Pro/100B, Adaptec U2W SCSI controller with IBM DDRS 9.1GB & IBM DNES 9.1GB LVD disks working in LVD mode and a Quantum Fireball SE 4.3BG single ended narrow scsi disk used for 3.3 FreeBSD cvsupped a day ago. I think the SCSI chain is ok (termination, length, etc) I also tried the performance configuring a 'one disk concatenated' volume on the first hard drive, but the result was terrible again (below 50% of the standalone disk performance). I noticed when I write onto the raw vinum device it performs pretty well, whereas the cooked one is good in reading, but very slow in writing. I made so many tests in different ways, so I cannot believe it's related to a configuration mistake. Anyway here's the vinum.cfg: drive d1 device /dev/da1h drive d2 device /dev/da2h volume double plex org striped 256k sd length 8700mb drive d1 sd length 8700mb drive d2 The hardware configuration is very popular, so I hope someone has already solved this problem, if it's related to the hardware. Thanks in advance, iani To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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