Save my data!!Please

[xiaoy]

Ｉ　am Chinese, Not good in ENGlish , There are six 3Tb-Hard diskes in my NAS4FREE , RAID-Z, NAS4FREE automatic reboot in 15 seconds,

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when I use "Import on-disk ZFS config" command in a new Nas4free system ,It will be reboot in 15 seconds.

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How can I recovery my data, It's very important!

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[chrisf4lc0n]

Normally with at least one GPT working you should be able to use the drives... Unfortunately if both GPT failed there is not much you could do to save your data, as you will need to destroy the GPT and create a new one.
Here is the guide:
viewtopic.php?f=66&t=3977&p=20868&hilit=GPT#p20868

[chrisf4lc0n]

You could run:

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gpart recover -f ada*

[b0ssman]

i thought zfs does not need partitions.

[xiaoy]

are there any otherways?

[b0ssman]

have you tried this
http://nexentastor.org/boards/2/topics/3506

[xiaoy]

have you tried this
http://nexentastor.org/boards/2/topics/3506

I read it, but I still do not know how to do, I need more detailed steps, I almost do not know linux.

How can I enter the command line, and under what circumstances to use these commands
I

[xiaoy]

You could run:

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gpart recover -f ada*

Thank you for your reply, such an order is entered by what the environment, there is no way to recover the data, only to re-establish a new data pool it? Any one of these diskes did not physically damaged , how it go wrong, what a pity.

[chrisf4lc0n]

In the terminal type in:
gpart recover -f ada1
then ada2 and on it may help...

[xiaoy]

In the terminal type in:
gpart recover -f ada1
then ada2 and on it may help...

thank you ,but……

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[xiaoy]

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[xiaoy]

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[lux]

few years ago i have similar error
try to disengage first HDD - then boot & import pool
if not work try to disengage next HDD - boot & import
& so on

work for me, because one of my HDD are faulty & disallow import my pool...

good luck!

[chrisf4lc0n]

Try the above solution, as I give up, cannot think of anything else, sorry

[xiaoy]

few years ago i have similar error
try to disengage first HDD - then boot & import pool
if not work try to disengage next HDD - boot & import
& so on

work for me, because one of my HDD are faulty & disallow import my pool...

good luck!

Thank you ,I tried it ,but it's not ok
I give up , ZFS problems more serious than NTFS，all the data was losed

[chrisf4lc0n]

Sorry to hear that my friend, in general ZFS is very reliable, but unfortunately like everything it can go wrong
That is why it is so important to have another layer of redundancy in place, like a backup etc...

[substr]

The proper GPT recover would be without the -f, I think.

But why do you have GPT labels on a ZFS drive? Is the GEOM/GPT grabbing the drives so that ZFS can't get hold of them?

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gpart recover ada0

[chrisf4lc0n]

The proper GPT recover would be without the -f, I think.

But why do you have GPT labels on a ZFS drive? Is the GEOM/GPT grabbing the drives so that ZFS can't get hold of them?

I think this always the case, I had a similar problem a while ago:

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May 28 10:21:58 nas4free kernel: GEOM: ada0: the primary GPT table is corrupt or invalid.
May 28 10:21:58 nas4free kernel: GEOM: ada0: using the secondary instead -- recovery strongly advised.
May 28 10:21:58 nas4free kernel: GEOM: ada1: the primary GPT table is corrupt or invalid.
May 28 10:21:58 nas4free kernel: GEOM: ada1: using the secondary instead -- recovery strongly advised.
May 28 10:21:58 nas4free kernel: GEOM: ada3: the primary GPT table is corrupt or invalid.
May 28 10:21:58 nas4free kernel: GEOM: ada3: using the secondary instead -- recovery strongly advised.
May 28 10:21:58 nas4free kernel: GEOM: ada4: the primary GPT table is corrupt or invalid.
May 28 10:21:58 nas4free kernel: GEOM: ada4: using the secondary instead -- recovery strongly advised.

The drives were readable, but slow in write:


When I fixed that using this guide:
viewtopic.php?f=66&t=3977&p=20868#p20868

I ended up having much better performance: