disk group is quarantined

[raihan20]

hi, 

i have 12 disks and 1 group dga01 raid 5 in msa2050. 2 weeks ago 3 of them degraded, and 1 fault. so i change the fault disk first, then auto reconstruction start and it joins group again. then i try to replace the 3 degraded disks. but the auto reconstruction cannot start. and the VDG still quarantined. so what should i do ? thanks

[ArunKKR]

Hi Raihan,

As you would be already aware RAID 5 can sustain only single hard drive failure. 
Disk group can report different status  ex: FTOL , Critical , QTOF
FTOL (fault tolerant and online) indicates healthy disk group.
Critical indicates one more drive failure could cause disk group to fail.
In RAID 5 critical status is reported when one drive in the disk group has failed.

I see that one drive failed and it was replaced and reconstruction started.
Please confirm whether the disk group was in quarantine state even before replacing the faulty disk.
Did the disk group move to quarantine state during rebuilding ?
Are the 3 disks reporting degraded state due to single path errors or multiple errors in events?

Its quite difficult to assist with quarantine disk group issues without reviewing logs
I would suggest logging an HPE support case and get the logs reviewed so that they could share the correct steps to resolve the issue.
I understand that unit might be out of warranty.
I would still suggest logging a case and check for options.