NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
shadow copies for off site disk
Hi all,
I want to create a offsite disk to cover those catastrophic scenarios like fire/theft etc.
I own a readynas duo populated with two disks.
My plan is to remove one of the disks, take it off site, and place a new disk in its place. The assumption is the readynas will sync to the new disk.
Once a month I remove one disk, replace it with the off site disk and allow the current state to be synced over the old shadow disk.
If my world comes crashing down and I need to restore into a new nas, I will have a copy of my data that will be at worst 1 month old.
A few questions if you can help:
What is the procedure I should follow? i.e remove disk from bay two with power on, and place new disk in? or power off and swap a drive?
When I put a old copy disk back in (to be updated to current state) how can I know it wont become the 'master copy' and overwrite the other?
Any thing I shouldn't do?
Cheers
Shem
I want to create a offsite disk to cover those catastrophic scenarios like fire/theft etc.
I own a readynas duo populated with two disks.
My plan is to remove one of the disks, take it off site, and place a new disk in its place. The assumption is the readynas will sync to the new disk.
Once a month I remove one disk, replace it with the off site disk and allow the current state to be synced over the old shadow disk.
If my world comes crashing down and I need to restore into a new nas, I will have a copy of my data that will be at worst 1 month old.
A few questions if you can help:
What is the procedure I should follow? i.e remove disk from bay two with power on, and place new disk in? or power off and swap a drive?
When I put a old copy disk back in (to be updated to current state) how can I know it wont become the 'master copy' and overwrite the other?
Any thing I shouldn't do?
Cheers
Shem
7 Replies
Replies have been turned off for this discussion
- The disks need to be on the same bay where it was originally synched or else it will be reformatted by the NAS. My suggestion would be to remove disk 2, shadow clone disk 1. Once done, remove disk 1 shadow clone disk 2. Now, you will have 2 shadow disk for bays 1 and 2. Or get another unit and setup readynas replicate.
- This is not a good backup plan. One reason is that the SATA connectors on your hard drive are not intended for that many insertions/removals.
So my suggestion is to buy a USB drive for backup (or pick up a second NAS and use frontview backup).
- Replicate is included in OS6, but requires a license with the duo. For a while, cap1 was providing free replicate licenses in some cases - but he as since left Netgear...Nhellie wrote: The disks need to be on the same bay where it was originally synched or else it will be reformatted by the NAS. My suggestion would be to remove disk 2, shadow clone disk 1. Once done, remove disk 1 shadow clone disk 2. Now, you will have 2 shadow disk for bays 1 and 2. Or get another unit and setup readynas replicate.
-The duo v1 uses a different format for the "parity" disk (usually drive 2). Inserting a new disk 2 into the NAS will create a new disk 2 (which is not a clone of disk 1). Similarly for disk 1.
-If you were to insert an archived disk into an empty NAS, it should boot no matter which slot you inserted it into(it shouldn't need to be in the original slot). - Thanks for the replies.
Getting another nas is overkill for my home needs. Also the USB solution is very slow I have discovered.
If I was to do the disk clones, should I power the device down removing an existing drive? - mmmm, rethinking my approach after reading this http://www.readynas.com/?p=3153
A USB drive connected to a PC (backing up over a gigabit network) solves the speed issue. You can use robocopy or teracopy on the PC (both of which verify).shem wrote: mmmm, rethinking my approach after reading this http://www.readynas.com/?p=3153 - So I created jobs to back up all the folders I wanted.
200GB took 16 hours to backup to a USB disk (http://www.iogear.com/product/GHD335C250/) plugged into the front USB port.
not too flash is it. I'm not sure if a better external harddisk would improve that, I doubt it seeing as both sides (the IOgear and the nas) both only support USB2.
Oh well, I only plan on doing it ever 1 month anyway, and the next time should be an update not a full copy
Well as I said, it runs a lot faster if you connect the USB drive to a PC connected to a wired network. Probably about 3 hours for a full backup if the network was gigabit; about 5 if it is fast ethernet. A simple robocopy script running on the PC is one way to automate it.shem wrote: ...200GB took 16 hours to backup to a USB disk (http://www.iogear.com/product/GHD335C250/) plugged into the front USB port.
You can also do incremental backups with either with frontview or with robocopy. Though there is some value in writing everything, since USB drives do fail, and it is bad to discover that when you are trying to recover your data.
NETGEAR Academy
Boost your skills with the Netgear Academy - Get trained, certified and stay ahead with the latest Netgear technology!
Join Us!
