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тАО05-09-2007 12:43 AM
тАО05-09-2007 12:43 AM
Expanding array in DL380
In testing, I had an older HP server with a 5i controller. I had three 72GB disks in Raid 5, and when I expanded it to include a 4th, it took almost 3 days for the expansion to complete (with the controller having "expand priority" set to high.
The DL380 I want to do the real expansion on has a 6i controller.
Can i expect similar results, or should I expect this to take weeks?
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тАО05-09-2007 05:03 AM
тАО05-09-2007 05:03 AM
Re: Expanding array in DL380
I've never tried it, but that sounds like a long time...
Do you have a BBWC module (Battery Backed Write Cache) installed on your servers ?
That *might* have an effect on the expansion time...
Cheers,
Rob
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тАО05-09-2007 06:25 AM
тАО05-09-2007 06:25 AM
Re: Expanding array in DL380
the time it takes depends on a few things...
1. how much data you actually have stored on the existing array.
2. i/o level to that data.
In the ideal situation, it should take 15 minutes per GB worth of data, assuming you had 6 300GB drives in RAID5, @1.5TB usable and you have 1TB of data... the expansion would take @10 and a half days to complete... theoretically. Since you will have periods of usage on the system, you will need to add some time due to the controller doing double duty... expanding and serving up data.
The short story is... it's going to take a while to expand and will not happen overnight.
The BBWC will probaby help too.
Steven
HP Master ASE, Storage, Servers, and Clustering
MCSE (NT 4.0, W2K, W2K3)
VCP (ESX2, Vi3, vSphere4, vSphere5, vSphere 6.x)
RHCE
NPP3 (Nutanix Platform Professional)
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тАО05-09-2007 06:39 AM
тАО05-09-2007 06:39 AM
Re: Expanding array in DL380
If a drive fails during the expansion, and a hotspare kicks in, what happens?
What if for some reason we lose power or the server reboots during the expansion?
This is the info i have regarding a battery...i assume this means we have it?
Array Accelerator
Present Yes
Cache Status Enabled
Accelerator Ratio 50% Read /50% Write
Total Memory on Controller 192 MB
Battery Pack Count 2
Battery Status OK
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тАО05-10-2007 12:30 AM
тАО05-10-2007 12:30 AM
Re: Expanding array in DL380
Can this setting be changed during the expand?
Also - I thuoght there was a 6i controller in this server, it's a Smart Array 6400 - that make a difference?