Upgrading to larger drives

Discussion in 'Cisco/Linksys Network Storage Devices' started by pixelator, Mar 10, 2011.

  1. pixelator

    pixelator Networkin' Nut Member

    I've been running a NAS200 in raid1 mode with a capacity of 250GB for a few years now to back up photos etc and it's getting very close to maximum capacity. My plan is to replace one drive with a 1TB model, let the unit mirror the info to the new drive and then when that's done, replace the second drive with a 1TB drive and let the unit copy from the first drive again so giving me a Raid1 system with a 1TB capacity. If I understand correctly, the whole point of a mirrored system is to be able to replace a drive which malfunctions so will this work as I've described or do I need to back whole lot onto another drive and then start from scratch again? What's the recommended procedure?
  2. jac_goudsmit

    jac_goudsmit Super Moderator Staff Member Member

    I don't think this will work.

    If you replace one 250GB disk with a 1TB disk, it will probably only use 250GB of the 1TB drive. Then if you replace the other disk you will end up with two 1TB drives that both only have 250GB capacity. Besides, this procedure will take a VERY long time on the NAS200.

    It MAY be possible to do it the way you describe and then use a program such as gPartEd on a PC to enlarge the partitions as needed. But that will also take a long time and it's kinda risky because if something goes wrong during the repartitioning, your data may be damaged.

    The fastest way to do it is probably as follows:
    1. Use the NAS200 web GUI to make a backup of the configuration
    2. Power the NAS off with the power button and remove both 250GB drives
    3. Insert both 1TB drives and power the NAS up again
    4. Format the drives through the web GUI (*)
    5. Restore the configuration through the web GUI so all the user names and shared directories are the same as before
    6. Power the NAS off with the power button and remove both drives again
    7. Connect both the new drives, and one or both of the old drives to a PC running Linux or SystemRescueCD, and copy the files from the old drives to the new drives using rsync.
    8. Install the new drives back in the NAS.

    Of course this assumes that you have a way to connect three or four hard disks to a PC and that you have enough Linux knowledge to do this.

    (*) I would probably be impatient enough to turn the NAS off during the formatting and complete the formatting on the PC because it's going to take the better part of a day just to format the drives on the NAS...

    Final remark: Imagine what would happen to your photos, etc. if the NAS200 would stop working. Do you really trust the NAS200 to keep your data safe? I don't, so I make backups. Of course if you already use the NAS as a backup device and you have other copies of your data elsewhere, you can simply replace the hard disks and make a new backup on the new disks.

  3. Still_Awake

    Still_Awake Networkin' Nut Member

    Jac is exactly right, you will get a 250M filesystem on your ITB array. You can do as he suggested, or especially if you are not so technically minded or cautious with the data- you will find it simpler and safer to back up your data to another drive and start afresh on your fresh new 1TB array/drive.
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