NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
RAID 1 resync incredibly slow
I would've replied to this thread but I don't see any options to reply. https://community.netgear.com/t5/Using-your-ReadyNAS-in-Business/ReadyNAS-4312X-Initial-Sync-Incredibly-Slow/td-p/1312492
...
RealityDev wrote:
When I try to use blockdev I get an error that says:
-bash: blockdev: command not found
It's on my RN202 (and my RN526)
root@RN202:~# which blockdev /sbin/blockdev
What firmware are you running? Are you logging in as root?
RealityDev wrote:
Of course using the tips there is at your own risk.
- I wouldn't disable NCQ myself. All the posts I'm seeing that suggest that are quite old, and seem to target hardware controllers (not software RAID).
- I don't have any experience in tuning read-ahead - so if I changed that during sync, I'd change it back to the original value when it is done. You can see that value with blockdev --getra /dev/md127
The firmware version is 6.10.0 and logging in as root allowed me to change the settings. However it doesn't seem like the settings make any difference, it's still ultra slow at over 140 hours to sync a 4TB mirrored RAID. I can't believe Netgear does not optimize the device to sync faster than this, people are okay with taking a week or more to do something that should take less than a day?
RealityDev wrote:
I can't believe Netgear does not optimize the device to sync faster than this, people are okay with taking a week or more to do something that should take less than a day?
It shouldn't take a week for 2x4TB so I think something is wrong.
What disks are you using (manufacturer and model)?
Have you looked at the smart stats for both disks?
# smartctl -x /dev/sda
# smartctl -x /dev/sdbThe -x will give you some data on recent failed commands, which I think is relevant here.
The drives we are using are the following:
Western Digital WD4000FYYZ ENTERPRISE 4TB 7200RPM, 64MB Cache SATA 6.0Gb/s 3.5"
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
