Pegasus R6

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  • Last Post 27 September 2018
ANDRES BENTOS posted this 27 September 2018

Hi, I got a Client who has a Pegasus R6 device configured with a RAID 5, 3x2TB + 2 TB .

 

The device is warning about the message "OK, PFA" status un the Array of the RAID. I readed that this is sign of a imminent disk failure and we should replace it as soons as possible. 

 

Ths disk installed on slot 1 reports several Draw Error Read on its counter. This hard drive belongs to RAID 5

 

I got two answers

 

 

 

1. Its normal that when this disk mounted on slot1 is failing users got problem while reading data from RAID? In my experience a RAID 5 should works fine with read operations (a little more slow speed of course) when it has one disk failling.

 

Do I'm wrong?

 

2. Its about replacing and rebuilding.

 

The manual say that I can setup auto rebuild, give max priority to the operation rebuild (to make it more faster) and then replace the damaged external unit (in this case located on slot1).

 

 

 

Is that correct? is that secure procedure?

 

Do you got any comments?

 

 

 

Thanks to all for read an reply.

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ANDRES BENTOS posted this 27 September 2018

Thanks for you reply.

 

Regards.

Andrew B

Pradeep Chidambaranath posted this 27 September 2018

Hi Andres,

Kindly find the inline answers for your questions.

1. Its normal that when this disk mounted on slot1 is failing users got problem while reading data from RAID? In my experience a RAID 5 should works fine with read operations (a little more slow speed of course) when it has one disk failling.

Yes, even with one drive failure, the user should be able to access the data without any issues. However, there are exceptions. Sometime, there will be errors, however the drive will be still under OK condition, in those situation read/write will be slower. If there are errors and if the drive is marked as OK, PFA we recommend you to remove the drive from the unit and replace it with a new drive to start the rebuilding process.

2. Its about replacing and rebuilding.

The manual say that I can setup auto rebuild, give max priority to the operation rebuild (to make it more faster) and then replace the damaged external unit (in this case located on slot1).

 The condition applies when you have a spare drive configured on the unit. If there is a spare drive in the unit, then the spare will immediately start the rebuilding process, if you do not have a spare drive then when you insert a unconfigured drive it will automatically start the rebuilding process.

During the rebulding process, do not copy any data.

If you have any further question, kindly go to https://support.promise.com to create a support ticket with the complete subsystem report for further investigation.

 

Regards
Pradeep C

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