… situation did not get better, at least not with Dell RAID controllers, H700 and H800 have the same problem too. At the… Dell product line ? (Which is using LSI chips) Are there RAID controllers which do not have this problem ? For many installations it… part of complex IO subsystem performance testing – if you have RAID check what performance is going to be with failed hard…
Comment: When would you use SAN with MySQL ?
March 15, 2009 By 18 Comments
… with IBM Servers. I prefer having technologies like RSA, Server raid, memory chip kill, ability to obtain parts fairly easly even… center. Server raid is a great tool as well, sends you notifications when something is wrong with drives or raid controller. Also we… and found that it was extremely hard to make the raid controllers on most of these machines work unlike the IBM machines…
Comment: FlashCache: tpcc workload with FusionIO card as cache
June 8, 2010 By 20 Comments
… 4 drives, they tried hardware RAID, software RAID, RAID 1+0 and RAID 0), but in all cases the RAID controller or software couldn’t predict…
Comment: Aligning IO on a hard disk RAID – the Theory
June 9, 2011 By 18 Comments
… if partition table is aligned properly, after you create software RAID, there’s little difference what is the physical sector size… – while this depends a lot on the workload and the RAID controller, I think it’s fine to have a relatively small… mileage may vary. My experience with this is that different controllers behave differently so there’s no right answer or rule…
Comment: Death match! EBS versus SSD price, performance, and QoS
February 22, 2011 By 55 Comments
Justin, I think there are some RAID controllers coming in with SSD support. Some have special mode for … is hard to measure. If you issue 10 iops to RAID controller it still may be merged to 1 IO. I prefer…
Comment: RAID vs SSD vs FusionIO
May 5, 2009 By 17 Comments
Small note: Your RAID 10 assumes you pay only for the drives — not the RAID controller. So it may be more realistic to add about $200. Therefore: 8 x $190 = $1520 for disks + $200 for controller = $1790 $1720 / 292GB useful space = 5.9¢ per GB Still cheap in comparison.
Post: Benchmarks of Intel 320 SSD 600GB
February 22, 2012 By 2 Comments
…(R) Xeon(R) CPU X5650 RAID controller: Perc H800 RAID configuration: RAID 5 over 11 disks + 1 hot spare. RAID 5 is chosen for space…
Comment: How reliable RAID really is
October 15, 2012 By 13 Comments
… my understanding a Consistency check only checks the area of raid drives which contain data, omitting the free space. The issue… the unused areas of the raid disks, only found during a rebuild, at which point the raid controller can not handle the number…
Comment: Battery Learning still problem many years after
March 9, 2011 By 7 Comments
Most series 5 Adaptec RAID controllers are available with flash+capacitor instead of battery backup. These controllers are distinguished by having a “Z” in their model name (Z for Zero Maintenance). The upcoming series 6 controllers will all support flash+capacitor based backup, I belive.
Post: How multiple disks can benefit for single client workload ?
April 26, 2008 By 4 Comments
… RAID level for write intensive database systems, you will have 2 hard drives to pick reading any block. RAID controller (and even software RAID…
