Re: Partitioning >2.2 TB drives

["Mike Granito" <mgranito@gmail.com>]

How do you plan on setting this up and why would you use ext4 when either zfs or btfrs seem to be better at larger volumes. I would lean more ZFS just due to all the redundancy built into it.

-----Original Message-----
From: Robert G. (Doc) Savage [mailto:dsavage@peaknet.net] 
Sent: Saturday, April 27, 2013 10:12 PM
To: Michael Granito
Cc: silug-discuss@silug.org
Subject: RE: Partitioning >2.2 TB drives

On Sat, 2013-04-27 at 12:35 -0700, Michael Granito wrote:
> Doc,
> 
> It could very well be an issue with USB adapter. Is there any way you 
> could use esata?

Michael,

I should have thought of that. I have a Thermaltake BlacX eSATA+USB2 external "toaster", and with it gparted sees 3.64 TiB and can install a GPT partition table. It takes 25 minutes to create an ext4 filesystem.

        # gdisk -l /dev/sda
        GPT fdisk (gdisk) version 0.8.4
        
        Partition table scan:
          MBR: protective
          BSD: not present
          APM: not present
          GPT: present
        
        Found valid GPT with protective MBR; using GPT.
        Disk /dev/sda: 7814037168 sectors, 3.6 TiB
        Logical sector size: 512 bytes
        Disk identifier (GUID): A69992CB-B312-429F-A287-093EE78B5AB5
        Partition table holds up to 128 entries
        First usable sector is 34, last usable sector is 7814037134
        Partitions will be aligned on 8-sector boundaries
        Total free space is 5070 sectors (2.5 MiB)
        
        Number  Start (sector)    End (sector)  Size       Code  Name
           1              34      7814032064   3.6 TiB     0700  

        # df /mnt
        Filesystem           1K-blocks      Used Available Use% Mounted on
        /dev/sda1            3845708116    200704 3650156612   1% /mnt
        
        # df -h /mnt
        Filesystem            Size  Used Avail Use% Mounted on
        /dev/sda1             3.6T  196M  3.4T   1% /mnt

If my math is correct, with these drives a fully-loaded Backblaze would have a capacity of about 133 TB. I'm also guessing it would weigh something like 80 lbs.

--Doc




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