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seen 42 mins ago

Senior Systems Engineer with a Linux, virtualization and performance-tuning focus.

Careers.SE: http://careers.stackoverflow.com/edmundwhite

LinkedIn: http://www.linkedin.com/pub/edmund-white/7/588/147

ewwhite AT mac.com


9h
awarded  Nice Answer
9h
comment Centos server keeps jumping to address instead of static assigned address
Or just stop the service.
10h
awarded  Nice Answer
10h
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@SteveAmerige Don't modify the stripe size from default on the controller. And definitely don't mess with the ext4 options.
10h
revised Rear Rack Ears for Dell PowerConnect 2824 Switch
added 101 characters in body
10h
answered Rear Rack Ears for Dell PowerConnect 2824 Switch
11h
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
Is this data compressible at all?
11h
comment Rear Rack Ears for Dell PowerConnect 2824 Switch
I'm having a hard time envisioning what you're describing. What are you trying to do?
11h
reviewed Approve suggested edit on What to look for in a server rack?
11h
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@HopelessN00b You can safely use RAID5 with enterprise SAS disks... even 900GB and 1.2TB... but in groups of 8 or less. But here, the OP still hasn't answered exactly how much usable space is required.
12h
revised How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
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12h
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@SteveAmerige More detail! The RAID 5 is a non-starter. You just should NOT use it in 2014. What type of data is this? What would the virtualization technology be? KVM? VMware? I think the design here really needs some refinement, especially before investing in so much hardware... Do you know what the size of the "working set" of data will be per-VM? In instances where that value is known, you can cache and optimize around that. Tiered storage. SSDs. Is the workload read-biased or write-biased?
12h
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@SteveAmerige How much disk space do you need? You can't USE 24 disks in one RAID group, so there are some additional design considerations for your environment. Can you tell us what this system is here to do, what type of data is involved, and what the real performance requirements are?
12h
revised What to look for in a server rack?
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13h
revised How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
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13h
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@Tonny I verified this. 16-disk maximum for that controller.
13h
revised How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
edited title
14h
comment Seemingly Random Components on DL380 G5 No Longer Work After Applying Updates
Did you remove the existing drivers first?
14h
revised How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
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14h
answered How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?