Hi,
On 29/02/16 11:35, Ryan Schmidt wrote:
Backups to a locally attached disk work fine. I've used this for years without
backups becoming corrupted.
Backups to an Apple Time Machine over the network, whether over Ethernet or
wireless, work fine. I've used this for years without backups becoming
corrupted.
Backups to Server.app's Time Machine Server over the network, whether over
Ethernet or wireless, should work fine, since it's a feature Apple offers and
charges money for, but I have not personally used this yet.
I concur. I've used all three of the methods above and have *never* had
problems with corruptions with them.
Backups to a non-Apple network-attached storage (NAS) device that claims to
have Time Machine support will become corrupted over time, with the likelihood
increasing greatly if backups are attempted over wireless. I have used this for
years, and have had to start my backup over from scratch after Time Machine
declared it corrupted more times than I can recall. Non-Apple implementations
of AFP (i.e. netatalk) are simply not sufficiently compatible with Apple's
implementation to work reliably with Time Machine, no matter what the
third-party vendor trying to sell it to you says.
Again, I agree. For a while I used a WD NAS drive as my TM backup drive,
and these more than once got corrupted and the backups had to be started
from scratch...
Chris
My recommendation is to alternate backups between two different disks. That way
if you lose one backup you still have the other. You could even keep them in
different locations, i.e. one at home and one at work. Even if you only have
one backup and lose it, that's not a problem because it's a backup; you still
have the original.
-Ryan
On Feb 28, 2016, at 7:26 PM, [ftp83plus] <[email protected]> wrote:
I learnt the hard way that TM's efficiency is not necessarily what you expect
it to be. Corruption from power loss on an external drive three times, surprise
corruption on Linux server running AFP 3.4-compatible Netatalk two times in 3
months.
On directly-connected hard drives, there are very few issues.
Over the network and especially wireless, just a small glitch can corrupt the
backups.
Even Apple's own hardware doesn't necessarily prevent catastrophic failures.
Reading forums here and there, it seems there's no relationship between
connected equipment and risk for Time Machine backups. I understood TM is
basically so complex that it can't be repaired, no matter what some anecdotic
evidence show.
So to answer your question Dave Horsfall, I don't think there's a "good"
version of TM. It's all sweet while it works, but when it fails, it's usually the
nastiest way you could expect.
Pat
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