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Forum Discussion
Data recovery from inactive volume of ReadyNAS RN104 with four 4TB hard disks RAID-5
Hello, After replacing a disk on channel-2 with a new one and while resyncing at about 60% of the job I lost contact to my data. The message on the top of the screen is "Remove inactive volumes ...
When the disk is inserted, a SMART self test is run. You can also schedule SMART disk tests as one of the maintenance functions.
The system does monitor SMART stats, and the drive firmware can the NAS that it has failed. Of course the disk driver can also discover that the drive is not responsive, and at some point will declare the drive to be dead.
The RN104 uses software RAID, but there is hardware acceleration
I think the system does a short SMART test automatically daily and on boot with the option to schedule a longer test or run it from the boot menu.
SMART is useful in detecting problems with disks but it's not perfect. It won't detect every possible problem.
If you download your logs and look in smart_history.log you can see the history of key changes in SMART error counts.
Before replacing a failed disk it's important to check the stats to see how the other disks are going.
unfortunately my smart_history.log only shows the S.M.A.R.T. info when the drives were first installed (1 for each initial drive)
How does one schedule for S.M.A.R.T. checks on OS 6.5.1?
Then the key SMART error counts we monitor didn't change for the disks.
Go to System > Volumes, click the Settings wheel for the volume and choose Volume Schedule. Add a schedule for the "Disk Test" action.
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