James, earlier on he'd said he had them setup striped. I believe he
got them in RAID 6 instead. That's best for reliability. A striped
array that large is only as good as the weakest disk. Then he loses
up to 12 terabytes of data.
{^_^} Joanne
On 2011/06/06 05:28, James Holland wrote:
This has to be Raid-ed though. I would suggest you are using some sort of
hardware Raid as I've never heard of a disk that is 10TB. I thought the max
we are up to these days is 3.
On 06/06/11 12:25, Sunil M. Dogra wrote:
Hi,
Here is output pf fdisk -l. aslo I am not using any RAID.
With Best Regards
sunil
fdisk -l
Disk /dev/cciss/c0d0: 146.7 GB, 146778685440 bytes
255 heads, 63 sectors/track, 17844 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/cciss/c0d0p1 * 14001 15000 8032500 83 Linux
/dev/cciss/c0d0p2 1 4000 32129968+ 82 Linux
swap / Solaris
/dev/cciss/c0d0p3 4001 10000 48195000 83 Linux
/dev/cciss/c0d0p4 10001 14000 32130000 5 Extended
/dev/cciss/c0d0p5 10001 14000 32129968+ 83 Linux
Partition table entries are not in disk order
Disk /dev/cciss/c0d1: 10001.7 GB, 10001711325184 bytes
255 heads, 63 sectors/track, 1215972 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/cciss/c0d1p1 1 267350 2147483647+ ee EFI GPT
On Mon, Jun 6, 2011 at 11:38 AM, jdow <j...@earthlink.net
<mailto:j...@earthlink.net>> wrote:
Can you cut and paste the fdisk -l output into an email? It can tell
you a lot about what the drives really amount to.
Are you running it as a RAID with checksum or simply striping? Your
numbers suggest something like RAID 6.
This is the system I am currently prepping to use as a name server,
firewall, and email tool for a two person multi-computer (and a lot
of "gadgets") network here.
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00007e83
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 60802 487873536 8e Linux LVM
The header portion is REALLY interesting. It's a 500 gigabyte
drive. But, it's only 488386584 1k blocks, 476940 1 meg blocks, or
465 1 gigabyte blocks when speaking of 1024 byte entities rather
than 1000 byte entities.
Your 12 1 terabyte disks striped array is only 10.91 TeraBytes
in computer speak - 1024 per K rather than 1000 per k. Could
that explain your discrepancy?
{^_^} Joanne (First explained this to others in 1986. IMAO
disks should be advertised both ways for clarity.)
On 2011/06/05 22:11, Sunil M. Dogra wrote:
Hi,
Ans: / = ~45GB
/boot =~2GB
/swap =~16GB
I have another question
why gparted, fdisk -l, system-config-lvm are giving different
outputs for
12TB but giving the same output for 500GB
With Regards
sunil
On Mon, Jun 6, 2011 at 3:28 AM, jdow <j...@earthlink.net
<mailto:j...@earthlink.net>
<mailto:j...@earthlink.net <mailto:j...@earthlink.net>>> wrote:
On 2011/06/03 06:47, Alec T. Habig wrote:
James Holland writes:
Don't know why this is... But check how big your
other partitions
are using gparted.
Could it be that he's comparing the "1TB" drives he's
bought (which are
marketed as decimal 1x10^12 bytes) with the expected
(binary) 2^40
bytes?
That's a 10% reduction in perceived space. If the disk
format has also
reserved the traditional (and now obsolete) 10% for root
use only, then
suddenly we're 2.5 TB down from what one would naively
expect after
clicking on "Newegg, please send me 12 terabyte drives".
gparted will show the whole capacity (ignoring this root
reserve), but
"df" won't.
How big are /, /boot, and /swap?
(I'm old fashioned and silly, I like "/dev/fdisk -l /dev/sda
>foo" as
a way of exporting the actual partitioning. I am not sure
fdisk would
be happy with 12 TB, though. But showing us the actual
partitioning
might be a good idea.)
{o.o} Joanne. (Imprinted on the old tools back in about
'88 on of
all things "Amiga Unix.")
