Time Machine: Spit!!!
in [UK Mac]
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From: Tim Streater on 24 Nov 2009 07:12 On 24/11/2009 11:50, Jim wrote: > On 2009-11-24, T i m<news(a)spaced.me.uk> wrote: >> >> And understand that leaving your backup 'on-line' also has risks.If >> you were to leave your TM drive (and I assume that would have to be >> external to be of any real value), connected to the computer and mains >> power in between cycles then you could lose your computer and all 57 >> backups in one foul swoop? ;-( > > Time Machine[0] only mounts the drive during backup and restore operations. > During the rest of the time the drive/share is unmounted, so at much less > risk of corruption during power cycles. > > Jim > [0] when used with external drives, at least. Never tried using it on an > internal drive. I personally use a Time Capsule as I was able to replace > three devices with just one - external drive, wireless router and gigabit > switch. SWMBO's machine has a Firewire LaCie 250 we use for TM. It has to be mounted for TM to work on her machine, but mine mounts it remotely for each backup/ -- Tim "That excessive bail ought not to be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted" Bill of Rights 1689
From: Tim Streater on 24 Nov 2009 07:13 On 24/11/2009 12:01, T i m wrote: > On Tue, 24 Nov 2009 11:50:32 +0000, Jim<jim(a)magrathea.plus.com> > wrote: > >> On 2009-11-24, T i m<news(a)spaced.me.uk> wrote: >>> >>> And understand that leaving your backup 'on-line' also has risks.If >>> you were to leave your TM drive (and I assume that would have to be >>> external to be of any real value), connected to the computer and mains >>> power in between cycles then you could lose your computer and all 57 >>> backups in one foul swoop? ;-( >> >> Time Machine[0] only mounts the drive during backup and restore operations. >> During the rest of the time the drive/share is unmounted, so at much less >> risk of corruption during power cycles. > > Ok and in a 'files' sense then. It is still vulnerable from a mains > spike taking out the hardware at any time and (to a much lesser > degree) the files during what may even be an unneeded backup cycle > (ie, there may not be anything of importance to back up). Not so much in my case because all those drives are run through an APC battery backup. -- Tim "That excessive bail ought not to be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted" Bill of Rights 1689
From: Jim on 24 Nov 2009 07:14 On 2009-11-24, Tim Streater <timstreater(a)waitrose.com> wrote: >> >> Time Machine[0] only mounts the drive during backup and restore operations. >> During the rest of the time the drive/share is unmounted, so at much less >> risk of corruption during power cycles. >> >> Jim >> [0] when used with external drives, at least. Never tried using it on an >> internal drive. I personally use a Time Capsule as I was able to replace >> three devices with just one - external drive, wireless router and gigabit >> switch. > > SWMBO's machine has a Firewire LaCie 250 we use for TM. It has to be > mounted for TM to work on her machine, but mine mounts it remotely for > each backup/ > Oh, odd. Firewire oddity or something else? Jim -- http://www.ursaMinorBeta.co.uk http://twitter.com/GreyAreaUK My Oasis of Calm has dried up. However, my Garden of Angry is flourishing quite nicely.
From: T i m on 24 Nov 2009 07:46 On Tue, 24 Nov 2009 12:13:15 +0000, Tim Streater <timstreater(a)waitrose.com> wrote: >> >> Ok and in a 'files' sense then. It is still vulnerable from a mains >> spike taking out the hardware at any time and (to a much lesser >> degree) the files during what may even be an unneeded backup cycle >> (ie, there may not be anything of importance to back up). > >Not so much in my case because all those drives are run through an APC >battery backup. Is that an on-line or off-line UPS Tim? Have you tried simulating a power failure with it doing a TB backup? If you haven't please don't just on my behalf). ;-) T i m
From: Tim Streater on 24 Nov 2009 07:58
On 24/11/2009 12:46, T i m wrote: > On Tue, 24 Nov 2009 12:13:15 +0000, Tim Streater > <timstreater(a)waitrose.com> wrote: > > >>> >>> Ok and in a 'files' sense then. It is still vulnerable from a mains >>> spike taking out the hardware at any time and (to a much lesser >>> degree) the files during what may even be an unneeded backup cycle >>> (ie, there may not be anything of importance to back up). >> >> Not so much in my case because all those drives are run through an APC >> battery backup. > > Is that an on-line or off-line UPS Tim? Online (I guess). It's an APC ES 550, with 4 sockets which have battery power when needed, and 4 which are merely protected. I decided to get this as the power here is occasionally flaky (not so much since though). > Have you tried simulating a power failure with it doing a TB backup? > If you haven't please don't just on my behalf). ;-) If I unplug it from the all then it starts to beep but everything continues to run (well, I don't have the ADSL router or network switch connected through it. Just the Mini and external drives). It then gives about 20 mins run-time. -- Tim "That excessive bail ought not to be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted" Bill of Rights 1689 |