Re: [Hampshire] DAT as a backup medium

2017-04-22 Thread Tim via Hampshire 

On 22/04/17 12:37, Rob Malpass via Hampshire wrote:


I agree with just about everything that’s been said – though prior to 
one of the replies I didn’t know what an archive disk was.


The problem for me is

a)Cost

b)Durability

Agree that HDD should last for a few years – but we’ve all seen hdds 
fail.   From what I’ve read, unless you can spread your backups across 
sites (which may be an option) but tape seems the most durable 
solution – optical disks are nowhere near reliable for data you don’t 
want to lose.


I find it amazing hdd technology (which we’ve has since the 70s) is 
still the medium of preference.   When someone finally does crack this 
(I guess when SSDs do finally take over in terms of capacity and 
price) we’ll all look back on HDD as rather primitive. I guess we’re 
just in that period of limbo!


Cheers

Rob

*From:*Hampshire [mailto:hampshire-boun...@mailman.lug.org.uk] *On 
Behalf Of *Gordon Scott via Hampshire

*Sent:* 22 April 2017 10:57
*To:* hampshire@mailman.lug.org.uk
*Subject:* Re: [Hampshire] DAT as a backup medium


YMMV, but I personally have a PC in an another building, running 
backupPC  and connected by WiFi.

Your own private 'cloud' would also be an option.

I use my garage, but a friendly neighbour who would reciprocate may 
also be an option.


I tend to use Unison for cloning from one machine to another.

G.

On 21/04/17 15:55, Rob Malpass via Hampshire wrote:

Hi all

Is DAT still a viable backup medium if you want USB and to avoid
optical disks?

I’ve got about 8Tb to backup and for various reasons don’t fancy:
LTO, BluRay, Cloud or HDD (i.e. NAS).   I know DAT’s quite old
(and I might even be forced to use DAT160 because of cost) but if
it’ll do the archiving (write once read seldom) job I have in mind
for 8Tb (even if that’s a lot of tapes) I’d be happy.

Thanks

Rob

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Then you use multiple disks, dependant on how exact your 8TB is you 
could get away with a pair of 8TB disks set up in raid just to mirror 
each other.  If you have more than 8TB of data you will need 3 disks and 
move to raid3. I think you will find that a hard disk is more resilient 
than a tape (of any kind), recovery of a file is a lot quicker and in 
the event of a fire, there is a good chance that you can still recover 
data from a burnt disk which you won't be able to do with a molten lump 
of plastic that was once your tape eve if stored is some fireproof cabinets.



Tim


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Re: [Hampshire] DAT as a backup medium

2017-04-22 Thread Samuel Penn via Hampshire 
On Friday 21 Apr 2017 15:55:27 Rob Malpass via Hampshire wrote:
> Is DAT still a viable backup medium if you want USB and to avoid 
optical
> disks?

If the backups are stored at the same site as the original data, then no
(unless they're going into a suitably secure safe).

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Re: [Hampshire] DAT as a backup medium

2017-04-22 Thread Brad Macpherson via Hampshire 

On 22/04/17 12:37, Rob Malpass via Hampshire wrote:
> > I agree with just about everything that’s been said – though prior to
one of the replies I didn’t know what an archive disk was. > >  > > The
problem for me is > > a)Cost > > b)Durability > >  > > Agree
that HDD should last for a few years – but we’ve all seen hdds fail.  
>From what I’ve read, unless you can spread your backups across sites
(which may be an option) but tape seems the most durable solution –
optical disks are nowhere near reliable for data you don’t want to lose.
> >  > > I find it amazing hdd technology (which we’ve has since the
70s) is still the medium of preference.   When someone finally does
crack this (I guess when SSDs do finally take over in terms of capacity
and price) we’ll all look back on HDD as rather primitive.   I guess
we’re just in that period of limbo! > >  > > Cheers > > Rob >
I dunno, it's pretty amazing thinking about the tolerances involved in
manufacturing such a mass-market electromechanical device. Considering
all that can go wrong in a hard drive, and the way a lot of them are
treated (in laptops especially), how do they last as long as they do?

Cheers

Brad

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Re: [Hampshire] DAT as a backup medium

2017-04-22 Thread Rob Malpass via Hampshire 
I agree with just about everything that’s been said – though prior to one of 
the replies I didn’t know what an archive disk was.



The problem for me is

a)Cost

b)Durability



Agree that HDD should last for a few years – but we’ve all seen hdds fail.   
From what I’ve read, unless you can spread your backups across sites (which may 
be an option) but tape seems the most durable solution – optical disks are 
nowhere near reliable for data you don’t want to lose.



I find it amazing hdd technology (which we’ve has since the 70s) is still the 
medium of preference.   When someone finally does crack this (I guess when SSDs 
do finally take over in terms of capacity and price) we’ll all look back on HDD 
as rather primitive.   I guess we’re just in that period of limbo!



Cheers

Rob

From: Hampshire [mailto:hampshire-boun...@mailman.lug.org.uk] On Behalf Of 
Gordon Scott via Hampshire
Sent: 22 April 2017 10:57
To: hampshire@mailman.lug.org.uk
Subject: Re: [Hampshire] DAT as a backup medium




YMMV, but I personally have a PC in an another building, running backupPC  and 
connected by WiFi.
Your own private 'cloud' would also be an option.

I use my garage, but a friendly neighbour who would reciprocate may also be an 
option.

I tend to use Unison for cloning from one machine to another.

G.

On 21/04/17 15:55, Rob Malpass via Hampshire wrote:

Hi all



Is DAT still a viable backup medium if you want USB and to avoid optical disks?



I’ve got about 8Tb to backup and for various reasons don’t fancy: LTO, BluRay, 
Cloud or HDD (i.e. NAS).   I know DAT’s quite old (and I might even be forced 
to use DAT160 because of cost) but if it’ll do the archiving (write once read 
seldom) job I have in mind for 8Tb (even if that’s a lot of tapes) I’d be happy.



Thanks

Rob




 

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Re: [Hampshire] DAT as a backup medium

2017-04-22 Thread Gordon Scott via Hampshire 


YMMV, but I personally have a PC in an another building, running 
backupPC  and connected by WiFi.

Your own private 'cloud' would also be an option.

I use my garage, but a friendly neighbour who would reciprocate may also 
be an option.


I tend to use Unison for cloning from one machine to another.

G.

On 21/04/17 15:55, Rob Malpass via Hampshire wrote:


Hi all

Is DAT still a viable backup medium if you want USB and to avoid 
optical disks?


I’ve got about 8Tb to backup and for various reasons don’t fancy: LTO, 
BluRay, Cloud or HDD (i.e. NAS).   I know DAT’s quite old (and I might 
even be forced to use DAT160 because of cost) but if it’ll do the 
archiving (write once read seldom) job I have in mind for 8Tb (even if 
that’s a lot of tapes) I’d be happy.


Thanks

Rob


 
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