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November 9th, 2016 04:00
extend pool add new disks and create new pool ,change spare policy
i have 25 disks 20 used and 1 spare and 4 system i will extend pool space and add new disks in same pool i need to add many disks how many disks will used as spare ?
and i will create another new pool it will create new spare disk or no ???
last Q ... i create 3 datastore did all datastores share same spare disk or create there own spare disks ????
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Rainer_EMC
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November 9th, 2016 05:00
spares are global - not dedicated to a pool
rule is 1 spare for 30 total drives
for more info see the VNX white paper
test1test
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November 9th, 2016 06:00
thanks
no matter how many datestore i create right ???
but what happen if 2 disks down in same time ???
Rainer_EMC
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November 9th, 2016 15:00
correct
depends on your RAID level
Obviously if you only have one spare (or other fitting) unused disk than the system can only rebuild one.
the policy just defines the minimum number of spares - you can have more if you want - in fact there are no Special spares - any unused disk will act as a spare
Please see the VNX McX White paper for more info
test1test
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November 9th, 2016 23:00
thanks a lot
i have raid 5 (4+1)
so if i have 1 disk down the vnxe will use the spare in raid and replace the damage disk .. i will try to find the way to change the policy to create 2 spare to every 30 disks .... can i do it right ?
Rainer_EMC
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November 10th, 2016 02:00
If this is a VNX2 you do not need to create a spare
with VNX2 McX there is no spare creation - any unused disk will be used
For VNX1 Systems there is a command to create spares but no policy
Rainer_EMC
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November 10th, 2016 02:00
For VNXe it could depend on the model - but the Unisphere Online help on your system should tell you