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Forum Discussion
Will my NV+ need a "factory reset"?
If the increasing reallocated sector count is to be believed, my NV+v.1 soon will be needing a replacement HDD. If I'm reading this guide page correctly, I also will need to do a factory reset before upgrading to 2TB HDDs because I do not presently have 4k sector alignment. This obviously is something I'd rather not do if it were avoidable, so I'd like to lay out my facts and ask for confirmation.
This is (I think) the pertinent bit from the partition.log file:
Device Boot Start End Blocks Id System
/dev/hdc1 2 4096001 2048000 83 Linux
Since the start sector is not divisible by 4, I take that to mean I will have to do perform a factory reset before I can take full advantage of the 2TB HDDs. Yes?
If that one HDD should die before I can accomplish the factory reset, is there a problem with replacing it with a 2TB HDD (since the one HDD alone will not provoke a volume expansion)?
EDIT:
And presuming I am happy with the current configuration, and am not experiencing any configuration problems, is there any downside to backing up the old configuration, and simply adding it back once the factory reset is completed? Or is it a 'best practice' to start from scratch?
This is (I think) the pertinent bit from the partition.log file:
Device Boot Start End Blocks Id System
/dev/hdc1 2 4096001 2048000 83 Linux
Since the start sector is not divisible by 4, I take that to mean I will have to do perform a factory reset before I can take full advantage of the 2TB HDDs. Yes?
If that one HDD should die before I can accomplish the factory reset, is there a problem with replacing it with a 2TB HDD (since the one HDD alone will not provoke a volume expansion)?
EDIT:
And presuming I am happy with the current configuration, and am not experiencing any configuration problems, is there any downside to backing up the old configuration, and simply adding it back once the factory reset is completed? Or is it a 'best practice' to start from scratch?
5 Replies
Replies have been turned off for this discussion
- Your priority should always be data preservation.
What is the reallocated sector count of the bad disk?
Are there any errors on the other disks?
Your approach leaves you open to a substantial risk of data loss, the disk is failing and needs to be replaced.
The time to create a backup is now, before you replace the disk.
Even if you did not need to factory default we would recommend this, but this is an opportune moment to do the factory default.
How big is your current volume and how much data is on it?
How many disks and what size are they?
Config question: back it up and restore it. - Anybody care to venture whether that log file snippet indicates that my NAS is not presently configured with 4kb sector alignment?
- Correct. You have 512-byte sector partition alignment. If you use a disk with 4k sectors and don't do a factory default you will likely find write performance is very poor.
mdgm wrote: Correct. You have 512-byte sector partition alignment. If you use a disk with 4k sectors and don't do a factory default you will likely find write performance is very poor.
Thank you for the answer, and for directly addressing my question.- Tennessee Slim, you seemed to have done your homework on sector alignment and realised that you probably needed to factory default. You were indicating from your other questions that were already planning to factory default.
Implicit in your message was that you did not have a backup, hence my reply emphasising that.
As far as the need for factory default goes, I think I was clearly indicating that you needed to do one, but also that you should do it before replacing the disk as it would be adviseable to back up the data before replacing the disk anyway.
I could have provided a simpler, more explicit answer for you, but you did sound like you had a good understanding and my reply was pitched accordingly.
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