Date: Wed, 18 Jul 2001 14:00:04 -0500 From: Adrian Gonzalez <adrianbsd@globalpc.net> To: freebsd-isp@FreeBSD.ORG Subject: Adaptec 2100S RAID Performance Message-ID: <3.0.6.32.20010718140004.01057240@globalpc.net>
next in thread | raw e-mail | index | archive | help
Hello everyone Sorry if this is slightly off topic, but I couldn't find anything similar on the archives. Here goes... I recently got an Adaptec 2100S single channel RAID controller (Ultra 160) and 4 Seagate Cheetah 18G 15K RPM drives. Basically, I mounted the 4 drives in a very nice but somewhat pricey enclosure from Storcase (http://www.storcase.com) and connected the array to the Adaptec card using a 3 ft Ultra-160 cable. The array was configured as RAID 1+0 (two pairs of two-drive RAID1 arrays) to get the best performance. FreeBSD 4.3 happily detected the controller and the disk array. I created a single partition and mounted it under /raid. Now for the question: What kind of performance should I expect from the array? I did simple tests like: dd if=/dev/zero of=test.file bs=1024k count=1000 and wasn't terribly impressed with the performance. dd reported about 44Meg/sec reads and 18Meg/sec writes on average. I know this isn't a terribly reliable way to test the performance, and I'm hoping the advantages of using RAID will show themselves once this array is in a production server under a multiuser environment, but I can't help feeling it's somewhat on the slow side. Anyone have a similar setup or some suggestions for better ways to benchmark this array? Since this is somewhat off-topic, please reply directly to me. I will post any interesting results/observations to the list. Thank you -Adrian To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3.0.6.32.20010718140004.01057240>