Hi, We're having trouble getting reasonable performance with an Adaptec 2230SLP (FreeBSD shows it as 2130S SCSI U320) and latest FreeBSD 5.4 snapshot using AAC drivers :
__FBSDID("$FreeBSD: src/sys/dev/aac/aac.c,v 1.101.2.5 We're comparing diskinfo -t data between SCSI U320 and another machine with SATA 150, and the results are surprising. We're getting around 45MB/s on the 2130S , while on SATA we receive above 60MB/s. I've checked everything (cables, drives, played with read/write cache enabled or disabled) but not with any significant results. I've seen other posts as well complaining about slow performance with Adaptec 2100S series cards and FreeBSD 5.x . Any experiences with these adapters ? Is this Adaptec issue or something with the AAC driver limiting its performance ? It is to the point where I can actually feel the server is running awfully slow when doing backups...etc Below are some info about the card, the drives and tests results: AAC0> controller details Executing: controller details Controller Information ---------------------- Remote Computer: S Device Name: S Controller Type: No Info Access Mode: READ-WRITE Controller Serial Number: Last Six Digits = 265763 Number of Buses: 1 Devices per Bus: 15 Controller CPU: Unknown Controller CPU Speed: 200 Mhz Controller Memory: 256 Mbytes Battery State: Not Present Component Revisions ------------------- CLI: 1.0-0 (Build #5263) API: 1.0-0 (Build #5263) Miniport Driver: 4.2-0 (Build #7348) Controller Software: 4.2-0 (Build #7348) Controller BIOS: 4.2-0 (Build #7348) Controller Firmware: (Build #7348) Controller Hardware: 2.64 The drives are in RAID-5 setup freebsd3# diskinfo -t /dev/aacd0s1f /dev/aacd0s1f 512 # sectorsize 221978296320 # mediasize in bytes (207G) 433551360 # mediasize in sectors 26987 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 4.196076 sec = 16.784 msec Half stroke: 250 iter in 3.621842 sec = 14.487 msec Quarter stroke: 500 iter in 5.971962 sec = 11.944 msec Short forward: 400 iter in 6.133371 sec = 15.333 msec Short backward: 400 iter in 6.284642 sec = 15.712 msec Seq outer: 2048 iter in 3.366757 sec = 1.644 msec Seq inner: 2048 iter in 3.225525 sec = 1.575 msec Transfer rates: outside: 102400 kbytes in 3.137279 sec = 32640 kbytes/sec middle: 102400 kbytes in 2.997041 sec = 34167 kbytes/sec inside: 102400 kbytes in 4.061875 sec = 25210 kbytes/sec -- COMPARE THIS WITH SATA DRIVE in RAID-1: freebsd1# diskinfo -t /dev/ar0s1g /dev/ar0s1g 512 # sectorsize 135622916608 # mediasize in bytes (126G) 264888509 # mediasize in sectors 16488 # Cylinders according to firmware. 255 # Heads according to firmware. 63 # Sectors according to firmware. Seek times: Full stroke: 250 iter in 1.494205 sec = 5.977 msec Half stroke: 250 iter in 1.417056 sec = 5.668 msec Quarter stroke: 500 iter in 2.862548 sec = 5.725 msec Short forward: 400 iter in 2.354758 sec = 5.887 msec Short backward: 400 iter in 2.300288 sec = 5.751 msec Seq outer: 2048 iter in 0.163812 sec = 0.080 msec Seq inner: 2048 iter in 0.177120 sec = 0.086 msec Transfer rates: outside: 102400 kbytes in 1.401566 sec = 73061 kbytes/sec middle: 102400 kbytes in 1.664351 sec = 61525 kbytes/sec inside: 102400 kbytes in 2.861386 sec = 35787 kbytes/sec Any input is much appreciated... Thx, Tamouh Hakmi _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"