Breaking News: I got the memory/battery upgrade for the P400 and installed both (512MB memory card replaces 256MB card) and has the battery added. The RAID5 speed is through the roof. I was getting 2 MB/sec with small block sizes. One a standard desktop drive I get around 4000 MB/sec with small blocks. With the memory upgrade and battery added, I got 28000 MB/sec with small block sizes. With large block sizes I got several times the raw speed of a single drive, like you should. For large block sizes the RAID5 array had 370,000 MB/sec write speed and 586,000 MB/sec read speed.
I then kept the 512MB card installed but removed the battery. The write speeds are back in the toilet. I am going to try just the battery next for my amusement, but I have decided that the "stock" P400 card with 256M and no battery is only good for mirroring, not for RAID5. Tom -----Original Message----- From: Glen Johnson [mailto:gjohn...@vhcc.edu] Sent: Tuesday, February 24, 2009 9:51 PM To: NT System Admin Issues Subject: RE: HP RAID5 P400 SATA questions Tom. I am very interested in the outcome of this as I have 5 servers on order and 4 of them will have this same controller. I forwarded the first email from this thread to our rep to see if he had heard anything and asked if we should be concerned. He said he would do some checking and let me know what he learns. I'll let everyone know if he shares anything of value. I sure hope it is something that can easily be fixed as it may be too late for us to change the order. Thanks. Glen. ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
