Date: Tue, 14 Apr 1998 12:41:24 -0700 From: Brandon Huey <brandon@epigram.com> To: freebsd-scsi@FreeBSD.ORG Subject: RAID performance/benchmarking Message-ID: <3533BBE4.DF09519@epigram.com>
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Dell PowerEdge 4200/300, 96MB RAM, 3 9GB Seagate Barracuda SCA drives DPT PM3334UW w/64MB cache FreeBSD 2.2.6 DPT kernel options: DPTOPT DPT_MEASURE_PERFORMANCE DPT_FREELIST_IS_STACK i created an array group with the dos util 'dptmgr' from default settings. using IOZONE and Bonnie, i create a 128MB file for read/write benchmarking. i am aware of the performance implications of RAID-5, but I am getting about 2MByte/sec max write transfer rate compared with 19MByte/sec on reads. For a pci ultrawide controller, are these figures suspect? What kind of write performance hit should one expect w/RAID-5 ? Thanks, -bh -- Brandon Huey Epigram, Inc. bh@epigram.com +1 408 720 3027 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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