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comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
thanks for all your help. I had a total disk crash yesterday with the raid becoming completely unresponsive and crashing Mac OS X whenever I tried to access it. As a last resort I then installed my RocketRAID 622 card and connected the existing RAID to it. Since my Lian Li unit has a build in controller the new card could simply pick up the raid array and mount the disk, all data is still there and accessible. Seems it was a faulty PCI Card (Sil3132) after all this madness. Thanks again, I wouldn't have thought of this by myself.
Sep
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accepted Can a Raid5 array be optimized using defragmenting or other maintenance tools?
Sep
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comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
I have tried running the Disk Speed Test app but doing so on my internal SSD works fine (though it never seems to fully complete the test; after ~30min i stopped the app) but when trying to do the same thing with a target disk being the RAID5 then the app just sits on the first write with 0MB/s and it crashes the app and Finder.app when I try to stop the test… pretty odd.
Sep
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comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
Hey Dustin, thanks for the comments! I have downloaded the app and will run the tests tonight then report back. Many thanks so far!
Aug
30
comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
Thanks for your very detailed answer! Much appreciated. A couple of questions though: 1) Is there any way of testing for where the bottleneck is? Something like a benchmarking tool that simulates lots of traffic to test read/write performance… 2) Can you recommend a high quality raid controller card for Mac OS? I 2 another raid cards alread a SIL3531 (for which there are no Mac drivers) and a Highpoint RocketRAID 622 card. Will my existing raid still work when the eSata cable is connected to one of those cards instead of the Sil3132?
Aug
30
comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
Thanks for the clarification. Mine is definitely not setup to be 'extendable' in any way, so since I now know this isn't an inherent feature of Raid technology this option is out for me.
Aug
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Aug
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comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
Thanks for that, I will have a look around for Mac Os X defrag software and read their instructions as to available disk space etc. Hopefully that will make a bit of difference too. Is it possible to just add another 2TB drive to the existing Raid array?
Aug
29
comment Can a Raid5 array be optimized using defragmenting or other maintenance tools?
Good questions! The router is 1000 Mbit BUT the C-200 Media Center only supports 100 Mbit so up until the router everything is Gigabit whereas the actual transfer speed to the streaming device is just 100 Mbit. As far as downloading goes, yes, in this last occurrence I was downloading to the raid as I was watching/streaming data. I don't have any Firewall installed and my Mac Pro is the DMZ in the router (static IP, internal + external).
Aug
29
asked Can a Raid5 array be optimized using defragmenting or other maintenance tools?