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Wes

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Reply with quote  #16 
What is your contingency plan if the array fails?

Is it a file share or what kind of data/service?
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nikolas.e

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Reply with quote  #17 
Quote:
Originally Posted by Wes
What is your contingency plan if the array fails? Is it a file share or what kind of data/service?


It is a file share server locally on our premises. It hosts users data(Docs,Excel,PDF and other). In this case if there is catastrophic failure for the raid5 which will demand more that 1 disks to fail i will have to rebuild the raid and recover the data from the latest backup.I am sure this will cause downtime almost 2 days
Windows is on a different array (Raid1).


Note : There is no hotspare setup for Raid 5. Question (Should i add a hotspare?) The reason i am asking is that i know if a disk goes to predictive failure state hot spare will not kick in untill the disk is in failed state(Correct me if am wrong). and if this happens during work hours users read/writing and system rebuilding data on hotspare it will have more chances of failing. 




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Wes

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Reply with quote  #18 
Ya I wouldn't do a hot spare for raid5. Luckily this is only a file share and hopefully your daily rate of change isn't so huge.

Do you have any budget? I would recommend setting up a temporary secondary storage location and using robocopy to duplicate the data to it. Might take a while to fully populate the first pass but subsequent passes should be quick if the rate of change isn't too great. Then you just schedule a brief downtime of 5-10 minutes late at night where you flip the share over to the new storage - then rebuild your array and reverse the process.

A cheap synology or similar array might be one option. Something like 4x3tb in a raid10.
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nikolas.e

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Reply with quote  #19 
Quote:
Originally Posted by Wes
Ya I wouldn't do a hot spare for raid5. Luckily this is only a file share and hopefully your daily rate of change isn't so huge. Do you have any budget? I would recommend setting up a temporary secondary storage location and using robocopy to duplicate the data to it. Might take a while to fully populate the first pass but subsequent passes should be quick if the rate of change isn't too great. Then you just schedule a brief downtime of 5-10 minutes late at night where you flip the share over to the new storage - then rebuild your array and reverse the process. A cheap synology or similar array might be one option. Something like 4x3tb in a raid10.


Wes thank you very much for the info and recommendations. Though i do not know if any changes will occur i am not the one taking the decisions here [smile] i will suggest it to my admin.(Budget is limited as far as i know but anyway this is just an excuse).  Sorry for the delay

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