find wwn sas controller hp smart array controller

#FIND WWN SAS CONTROLLER HP SMART ARRAY CONTROLLER SERIES#

If I access a single drive out of the drive pool and all drives are in sleep mode, it takes approximately 10 seconds for the drive to come online. When the drives are connected to the controller direct, this feature works just fine but once the HP SAS expander is in line the drives simply power up when power is applied. I tried staggered spin-up, but the HP SAS expander doesn't seem to support this feature and all drives power up right when power is applied. If I remember correctly, I had asked Areca about this but have yet to see a reply from them on this issue. If anyone out there knows a way to change that, I would very much appreciate your insight into this. This doesn't sound to bad, but if you multiply this by 48 drives (48 out of the 50 drives are connected via the ARC-1680i and the two HP SAS expanders in my server), that results in 480 seconds or 8 MINUTES! So a shutdown takes over 8 minutes to complete! I have been searching for a way to do a parallel wake-up rather than a sequential wake-up but have yet to find a solution to my problem. These drives take an average of about 10 seconds each from the time the controller sends the wake-up command until the drive signals the ready state to the controller. during a OS shutdown), the controller wakes up the first drive, waits for a response from the drive that it is ready to be accessed, then moves on to the next drive and repeats this process. It handles individual drives just fine (takes about 10 seconds to respond), but when the OS needs to access all the drives (e.g. The controller handles the spin-down quite nicely, but the wake-up is an issue for me. The only way I got the spin-down feature to work is with the ARC-1680i controlling the amount of time that passes between accesses to spin-down the inactive drives. I also use FlexRAID and the ARC-1680i is setup in JBOD mode (in essence I am using the RAID controller as a dumb HBA).

I am using the ARC-1680i in combination with two HP SAS expanders in my 100TB server. Here's the M4 SSD on the LSI 8888ELP note this only a 3gb/s controller not a 6 gb/s like the M4 SSD, the contoller has RAID firmware not IT so I created a single disk RAID 0 array, this is w/ performance enhancements enabled(controllers cache, read ahead, etc.) I also ran a test w/ everything off and got just slightly higher number than you'd expect. The one thing I didn't like is it doesn't send smart data to hard drive sentinel and WHS disk management plug in(temp display) on non RAID 5/6 arrays like my LSI controllers did. I just put my first Adaptec controller online yesterday (not counting the integrated one-which doesn't offer the same power saving and performance enhancements) so far I'm like it, all the drives on it are currently powered down as they're not in use, I did test on my new M4 SSD on it and one of my LSI controllers and it showed better performance enhancements on ATTO Bench (see pics below). I'm currently switching over from LSI to Adaptec and from RAID 5/6 to flexRAID(I will be using RAID 0 arrays under it as I need performance on some of the storage) in my server for the power savings.

#FIND WWN SAS CONTROLLER HP SMART ARRAY CONTROLLER SERIES#

All the LSI based controllers I've used only supported spin-down of hot spares, Adaptec(5 & 2 series but these are RAID models but they support JBOD on the same firmware, possibly others) and Areca support spin down and I think some Highpoints also do making them and the entry level Adaptecs probably the most inexpensive choices.

Find wwn sas controller hp smart array controller