I store all my photo files on an external hard drive (500 GB LaCie). Then I'd burn copies to DVDs as another backup. But burning DVDS is extremely time consuming and I fear not a good solution for the future. I'd like to get a second external hard drive and have it mirrored to my first external hard drive. How could I set this up?

I don't store my photos on my internal hard drive b/c it is too small - 80gb. I wonder if I should: 1.

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Mirror 2 external hard drives (if possible, and if so, is this slow?) 2. Install a new larger internal hard drive and mirror to an external hard drive or???

I've read about RAID set ups, Drobos, etc. And other posts on this site and am still a little confused as to what the best solution. I'm trying to keep it budget too.

Thanks in advance. I have a 1.8 GHz PowerPC G5. If you want to backup a backup, just tell it to copy one drive to another! Manually download itunes 12 for mac.

It can even do smart backups that means that you won't have to copy all of the files everytime, but only the new and changed ones. Works with external and internal HDs, so there's no difference there. If I were you, I'd get an external drive with a little more space than your internal HD and use TimeMachine to do your backups! It's easy to use and secure (backups every hour). Also, the chances that two drives break at the same time is very, very, very small, so invest the money that you save on a third drive to get a better and bigger secondary drive. I store all my photo files on an external hard drive (500 GB LaCie).

Then I'd burn copies to DVDs as another backup. But burning DVDS is extremely time consuming and I fear not a good solution for the future. I'd like to get a second external hard drive and have it mirrored to my first external hard drive. How could I set this up? I don't store my photos on my internal hard drive b/c it is too small - 80gb.

I wonder if I should: 1. Mirror 2 external hard drives (if possible, and if so, is this slow?) 2. Install a new larger internal hard drive and mirror to an external hard drive or???

I've read about RAID set ups, Drobos, etc. And other posts on this site and am still a little confused as to what the best solution. I'm trying to keep it budget too. Thanks in advance. I have a 1.8 GHz PowerPC G5. Click to expand.You have a couple of options, depending on what your objective is.

If you just want to guard against a drive failure, then a mirror (RAID1) is an option. The drawback to this is that it behaves like a single disk, so if you overwrite or delete a file, or have a filesystem problem, then your data is lost on both disks. If you want to guard against a drive failure, and have protection against the problems above, then replicating the drive is the way to go.

This means you use one of the backup drives as the master, and periodically (daily, weekly or whatever) sync the master to the backup using Chronosync or similar. If you only update files on the master, and don't touch the backup drive, then you won't have any sync issues.

I recommend option 2 in most cases. For reference, you can create a mirror'ed set up on 2 external drives, using disk utility. I wouldn't do this if you're using Tiger, as you have to reboot to re-sync the mirror if one drive is a bit slow waking from sleep mode, or if you unmount the mirror and try to remount it. Leopard is much better at handling this. Hope this helps. Click to expand.Thank you both.

I'm running Leopard 10.5.4. I'm after backup & concerned about drive failure. I want a backup solution dedicated to my photos. And ideally want to just buy one new hard drive. I think option 2 is what I want- I want 2 external drives duplicating the same info, but done automatically daily.

I will look into Chronosync and SuperDuper to help me do this- is there anything built into Leopard OS that I have but don't know about that will do this? I don't think need constant versioning/archiving (as in Time Machine) as the files don't change much after my initial edit (and I'm using the backup solution on 2 external harddrives w/o OS installed on them). Thanks again. Thank you both. I'm running Leopard 10.5.4.

I'm after backup & concerned about drive failure. I want a backup solution dedicated to my photos. And ideally want to just buy one new hard drive. I think option 2 is what I want- I want 2 external drives duplicating the same info, but done automatically daily. I will look into Chronosync and SuperDuper to help me do this- is there anything built into Leopard OS that I have but don't know about that will do this?

I don't think need constant versioning/archiving (as in Time Machine) as the files don't change much after my initial edit (and I'm using the backup solution on 2 external harddrives w/o OS installed on them). Thanks again. Click to expand.A RAID1 mirror is fine protection against a mechanical drive failure, but does not do anything to protect against file system corruptions, inadvertently overwriting a file, mistakenly formatting the disk/ deleting the partition, etc (I'm sure if I checked, all the above will have been reported on this forum at some time). Having a replicated drive gives you the redundancy of a second copy of the files in case you screw up one copy, but with the slight overhead of maintaining the sync yourself.

Automating the sync removes the overhead but introduces the possibility of replicating the screwed file to the backup if you don't notice it before the sync kicks in. Chronosync has the option to archive file deletions and replacements, which offsets this problem. Click to expand.Chronosync will use as much disk space as the total of the files you're sync'ing, plus the archived versions of files you've deleted and/or updated (if you have the archive feature enabled). So if your external master drive containing your pictures is using 250GB, then the first time you sync to your new external backup (assuming you sync all the files and folders), the backup will also use up 250GB. As you grow your master, then the backup will track it every time you sync. Every file you delete or update will be copied to an Archive folder on both drives, so that will add to the disk space, although if you don't mess with the files much then this will be minimal.

The difference between Chronosync and SuperDuper, is that SuperDuper is primarily an imaging program, so it will maintain an image of a disk, or a folder structure, and can do this to a schedule. I'm not aware that it can archive changes and deletions to files, it just maintains a faithful snapshot of the current state of the source. Also the selection options to build the selection of which files and folders to back up, and the filtering and processing options, are much less sophisticated than Chronosync. Chronosync, on the other hand, majors on the way you can select and filter and process the files that are sync'ed. For this reason I use both on my work system - I use Chronosync on a daily basis to sync and archive new and changed/deleted files in my main documents folder and a few databases in my Application Support folder, and use SuperDuper to take a weekly snapshot of my user folder, and a monthly bootable snapshot of my system disk.

Both tools are great, and have some overlap, but really have a different emphasis on their approach to backing up. Both have free trials so you can test them out.

For what you're doing I think I would go for Chronosync, as you don't need a bootable backup of the drive you're concerned with, and I like the archive option as a safety net against losing any valuable pictures. Hope this helps. So is it possible to use Disk Utility In response to: 'Why not just use Disk Tools and set up the two external drives as a Raid 1 mirror or each other?

It will only take a moment and seems like it would do what you want.' Most of the SuperDuper and ChronoSync comments seem to be about copying from the HD to an external drive. I am trying to figure out if I can just use the Disk Utility to set up a second back up external drive to my primary backup external drive. Can I use Disk Utility in Mac OSX to just set up the two external drives to mirror each other? My issue is that I manually copy the new pix and files from my Mac HD to my primary external drive but I'd like that primary external drive to be an identical back up to the primary back up external drive. Do I really need the ChronSync or SuperDuper to set this up.

MacBook Pro 10.4.11 2.16 Gz 2GB SDRAM EXTERNAL DRIVES FANTOM DRIVES MDC2000 thanks. Most of the SuperDuper and ChronoSync comments seem to be about copying from the HD to an external drive. I am trying to figure out if I can just use the Disk Utility to set up a second back up external drive to my primary backup external drive. Can I use Disk Utility in Mac OSX to just set up the two external drives to mirror each other? My issue is that I manually copy the new pix and files from my Mac HD to my primary external drive but I'd like that primary external drive to be an identical back up to the primary back up external drive.

Do I really need the ChronSync or SuperDuper to set this up. Click to expand.If your objective is simply to set up a mirror on two external drives, then you can easily do this with disk utility.

Advantages of mirroring: - Easy and free to set up - No user involvement in keeping the data mirror'ed - Protects against a single drive failure Disadvantages of mirroring: - Using 2 external USB drives can be troublesome, especially on a hub. If one drive spontaneously dismounts or doesn't wake from sleep (used to happen to me sometimes when I plugged another USB device in), then the mirror fails and you have to re-silver the mirror - i.e. You can't just reconnect the drive and it carries on. I had this happen too many times to make it fun. Rebuilding a 250GB mirror on external USB drives can take 18 hours. Firewire seems to be much more stable and faster - Mirroring does not protect against a file system corruption, you just get a mirror of the corruption - Mirroring does not protect against accidental file deletions or overwrites Using Chronosync or SuperDuper to sync, rather than mirror, negates all the problems above, but at the expense of having to set up a schedule to do it. Neither is limited to copying from the internal drive, you can use both utilities to sync an external to another external.

So both mirroring and sync'ing have their merits and drawbacks. You just need to take an informed decision when you decide which way is best for you. Click to expand.You can use the Disk Utility RAID feature, see above post. Your assumption about concatenated disk set is correct. Using Disk Utility to set up a RAID0 concatenated disk set, essentially adds the disks together to make one volume with the size of the individual disks added together, i.e.

Building a RAID0 with 2x 500GB drives will result in a 1TB volume (with usual disclaimer about different ways of calculating disk sizes). This sounds fabulous, and it is. The one drawback is that if either of the disks in the RAID0 concatenated volume fail, you lose everything on both disks. So your data is only safe while both disks stay functional. Either one fails - bye bye data.

I am trying to mirror a hard drive that is 3TB on the PC using SyncToy from Microsoft's PowerToys (as a backup method). But Mac is usually better for indexing and content searching, but is there either something similar to SyncToy on the Mac, or any Software RAID or Sync tools on the Mac that are free? I don't want to use a hardware RAID drive because (1) it is expensive and (2) if the RAID controller becomes bad, then I can't access either drive (unless if I remove the case and somehow connect the drive by itself, I think?

- which is not as simple as two independent hard drives, because then if one drive fails, there is still another fully working drive right there to be used immediately) thanks. The Apple provided Disk Utility (and diskutil shell command) will allow you full RAID control over internal and external drives. You do have to erase the drives to add the RAID capability, but then you can join those drives into RAID. That is the only potential drawback to implementing RAID storage on the Mac. Drive spanning, JBOD, striping and mirroring are all possible with Mac OS X software RAID. Lion brings the concept of physical and logical volumes to the OS, but RAID on Snow Leopard is also very fully functional. If you brake a mirrored RAID set - the drives are valid when connected to the same mac and portable to any other mac.

You are not locked into a proprietary standard and don't need any additional software for any of this functionality. Rsync and ditto are free sync tools - very scriptable, powerful, and free.