[clug] advice on drives for raid

[James Polley]

>From my ISP, I pay about $3/Gb for excess data.
2.7Tb at $3/Gb... about $9000.

Admittedly I would only have to pay about 10% of that figure to push it up,
but $900 will buy you about 3Tb of disk - and you won't be living in fear of
having to pull the data back.

Very cost effective!

On Wed, Aug 13, 2008 at 4:33 PM, Brett Worth <brett at worth.id.au> wrote:

> Nemo wrote:
>
>  I'm in the process of building up a new machine to be the personal file
>> server I need it to be - and I'm thinking of going down the "multiple
>> 1TB drives in a raid5" configuration.
>>
>
> I've a more cost effective solution for you.
>
> If you're after 2.7TB then all you need to do is create 384 gmail accounts
> with names like nemo000 nemo001 nemo002 ... nemo383.  Each account gives you
> 7026Mbytes of mail storage so 384*7026 = 2.7TB.
>
> Then you download and install gmailfs:
>
>
> http://richard.jones.name/google-hacks/gmail-filesystem/gmail-filesystem.html
>
> Create a top level directory:
>
>        mkdir /gmailfs
>
> You then create 384 individual mount points and mount all your accounts to
> these mount points:
>
> I=0
> while :
> do
>        DNAME=`printf "nemo%03d" $I
>        I=`expr $I + 1`
>        mkdir /gmailfs/$DNAME
>        mount -t gmailfs /usr/local/bin/gmailfs.py //gmailfs/$DNAME -o
> username=$DNAME,                  password=gmailpass, fsname=$DNAME
>        # make the datafiles
>        dd if=/dev/zero of=/gmailfs/$DNAME/datafile bs=1024k count=7026
>        DEVS="$DEVS /gmailfs/$DNAME/datafile "
> done
>
> Now just create a stripe across all these files and mount that file onto
> your final mountpoint.
>
> # mdadm --create /dev/md0 --level=0 --raid-devices=384 --loop-mode $DEVS
> # mkfs -j /dev/md0
> # mkdir /data
> # mount /dev/md0 /data
> # df -h /data
> /dev/md0              2.7T   2.4M  2.7T  0% /data
>
> Too easy!!
>
> This way you don't even have to back it up because google.com will back it
> up for you.
>
> Now that's going to save you a few hundred bucks! :-)
>
> Brett
>
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