HELP! Both Raid Drives "not readable"

Started Apr 2, 2013 | Discussions thread
webfrasse
Veteran MemberPosts: 3,757
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Re: Big Fan of DiskWarrior.....
In reply to Joe Tam, Apr 4, 2013

Joe Tam wrote:

I switched to RAID late last year and I should not have.  It's a false sense of security.

I previously had three drives in 3 external docking stations and my workflow was as follows:

I basically duplicate data to the second SSD on my laptop during assignments and do not format CF cards until..

I backup the data to the 1st & 2nd drive.  I will then copy all important assignments(keepers) to the third drive every week.  I also have an external 1 TB mini drive I leave at my relatives house with select assignments but I need to find a way so I can update the drive from my house.  Maybe swap two drives on a rotating basis(update one-take it to the offsite location, bring back the drive at the offsite location and update it?)

That's what I do. Always one drive off site, swap every other week.

I usually clean up the SSD every week.

The best thing about this system is there is not one point of failure.  The RAID is a single point of failure.  They never tell you that both drives can fail simultaneously.

In a manual routine you, the human, is almost always the point of failure;-) I also use Crashplan for automatic off site backup.

BTW, what should I do after I restore all the data?

I don't think the drives failed. I bet it's the enclosure. Get two new enclosures, put these drives in them and device a backup scheme using some automatic backup software.

I'm not clear on what your primary storage is. Are you only using a laptop? Is the primary storage one of these external drives? If that's the case you only have one backup, so get another drive so you have a rotating backup scheme.

I am thinking of ditching the Newertech.

Raid 1 is only protecting against a failed drive. It's not a backup, it doesn't protect from user errors or file corruption. I have decided to use single drives and software that clone them.

Would you trust it?

I wouldn't. I like to keep it simple but I'm not a professional photographer needing many TB's of data. I have a couple of TB, no client data.

Should I reformat and try again?

webfrasse wrote:

Joe Tam wrote:

BTW, I asked on other forums if two RAID 1 mirrored would be readable by docking station if removed and people said yes.  The data is there (but not readable by computer) and through some miracle DR is reading it.

There could be many reasons for this. If both drives have standard partition tables and are formatted for Mac, yes, they should be visible as single drives. Just googled a bit and the fact that there is some custom utility software shipped with the unit makes me suspicious. Maybe there is something non-standard about how these drives are partitioned?

Anyway, most reviews I saw was pretty negative to the unit itself. If I were you I would ditch the case and put these two drives in separate enclosures  and either use them in a rotating fashion where one drive is always off-site or use one drive as a primary local backup and the other as a cloned copy and have a software like CCC or Chronosync to keep the two drives in sync. That can happen every hour or so. A raid 1 is only protecting against hardware failure and so does this setup  but it's more flexible and has other advantages as well. Lots of software packages available for this type of backup.

DW is well worth it's money. Don't worry. I have never seen it fail on regular Mac Formatted drives. I also own DR3. It works differently and they complement each other. I think DR3 is capable of reading more types of filesystems than DW. I've used DR3 to recover CF cards something that DW definitely doesn't do.

What does the Disk Utility show when you mount one of these drives? I'm curious about things like file system, partition table and partition type.

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Mikael

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Mikael

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