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Re: How to undelete files on a ext4 partition

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On 2011-07-05, David Brown <david@westcontrol.removethisbit.com> wrote:
> On 05/07/2011 17:29, Robert Heller wrote:
>> At Tue, 05 Jul 2011 16:47:18 +0200 David Brown<david@westcontrol.removethisbit.com>  wrote:
>>
>>>
>>> On 05/07/2011 15:24, Jean-David Beyer wrote:
>>>> Kenny McCormack wrote:
>>>>
>>>>> Talk to your system administrator.  He should have access to this morning's
>>>>> backup tapes.
>>>>>
>>>> For the first time in many years, I removed all my files. I.e., I did
>>>> this in my home directory:
>>>>
>>>> rm -fr frammis *
>>>>
>>>> instead of
>>>>
>>>> rm -fr frammis*
>>>>
>>>> About a week before I did that, my tape drive (a VXA-2) quit, and I
>>>> ordered a new one. It came in and I installed it two days before I
>>>> screwed up as above, so I had little difficulty restoring the files.
>>>>
>>>> Now the question is: I have been using VXA drives since Ecrix started
>>>> making them. Then they were bought out by Exabyte, who have now been
>>>> bought out by Tandberg. Do you suppose people will be using tape for
>>>> backups in sufficient quantities that manufacturers will continue to
>>>> make the drives? So in another 7 years (that seems to be about how long
>>>> one of those drives lasts), I fear I will not be able to get a tape
>>>> drive like that anymore. I do not know the market research, but I assume
>>>> fewer and fewer people use tape for backups these days.
>>>>
>>>> I infer that most people do not do backups at all, that some make
>>>> partial backups once in a while to CD-ROM or DVD-ROM disks. But I prefer
>>>> to do total backups, because whatever I leave out will be what I need to
>>>> restore.
>>>>
>>>> Some people have hot swappable hard drives for backup, but that seems
>>>> expensive to me. I currently use 6 tapes for daily backups (Monday,
>>>> Tuesday...), 5 tapes for weekly backups (First Sunday, Second...), and
>>>> 12 tapes for monthly backups (January, ...). Now 23 hot swappable hard
>>>> drives would be too expensive, and they would not fit in my safe deposit
>>>> box. So what do people who take backups seriously propose to do going
>>>> forward.
>>>>
>>>
>>> You don't need hot-swap hard drives for backups.  You need a raid set so
>>> that you won't be upset by a disk failure.  You need some sort of
>>> snapshot system to have multiple snapshots without it needing huge
>>> amounts of disk space and backup time (rsync is your friend here).  Then
>>> you need the setup duplicated so that it will survive a serious fault
>>> (hardware, software, user) - preferably off-site (for fire and theft
>>> protection).
>>
>> Having 1 or 2 hot swappable hard drives might make sense.  With modern
>> SATA controllers (many of which are AHCI compliant), *any* random SATA
>> disk (even laptop ones!) are suitable as hot swapable.  There are
>> numerious SATA hot swap bays available, some fairly cheap (I have one
>> that cost less than US$50 that holds four 2.5" [laptop] drives and fits
>> in a single 1/2 height 5.25" bay [eg where a CD-ROM/DVD-ROM would fit]).
>>
>
> Hot-swapping SATA is certainly easy - I have an external hot-swap bay 
> myself.  But backups are even easier if you don't have to hot-swap. 
> (Although to be fair, hot-swapping your disks and moving them physically 
> is a lot cheaper than having a separate backup machine off-site - a good 
> solution has to match an appropriate budget!)
>

Except of course that if you have lug around your disks, you will get
lazy and forget-- both to lug them around and to make backups. 

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How to undelete files on a ext4 partition lucie <lucie3d@gmail.com> - 2011-07-05 05:07 -0700
  Re: How to undelete files on a ext4 partition gazelle@shell.xmission.com (Kenny McCormack) - 2011-07-05 12:22 +0000
    Re: How to undelete files on a ext4 partition Jean-David Beyer <jeandavid8@verizon.net> - 2011-07-05 09:24 -0400
      Re: How to undelete files on a ext4 partition Robert Heller <heller@deepsoft.com> - 2011-07-05 09:10 -0500
      Re: How to undelete files on a ext4 partition David Brown <david@westcontrol.removethisbit.com> - 2011-07-05 16:47 +0200
        Re: How to undelete files on a ext4 partition Robert Heller <heller@deepsoft.com> - 2011-07-05 10:29 -0500
          Re: How to undelete files on a ext4 partition David Brown <david@westcontrol.removethisbit.com> - 2011-07-05 22:01 +0200
            Re: How to undelete files on a ext4 partition Robert Heller <heller@deepsoft.com> - 2011-07-05 16:35 -0500
            Re: How to undelete files on a ext4 partition unruh <unruh@wormhole.physics.ubc.ca> - 2011-07-06 01:21 +0000
              Re: How to undelete files on a ext4 partition Robert Heller <heller@deepsoft.com> - 2011-07-06 06:46 -0500
                Re: How to undelete files on a ext4 partition unruh <unruh@wormhole.physics.ubc.ca> - 2011-07-06 12:09 +0000
                Re: How to undelete files on a ext4 partition Robert Heller <heller@deepsoft.com> - 2011-07-06 09:03 -0500
      Re: How to undelete files on a ext4 partition John Stumbles <john.stumbles@ntlworld.com> - 2011-07-06 07:51 +0000
  Re: How to undelete files on a ext4 partition John Reiser <jreiserfl@comcast.net> - 2011-07-05 17:19 -0700

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