disklabel - maximum size disk - Tru64UNIX v4.0f

[Andrew Rycroft]

Hi,

What is the maximum size disk I can use on Tru64UNIX v4.0f with the disklabel utility ? I recently create a 9 member 146GB disk drive RAID 5 RAIDset behina a KZPCC-AC. When I came to disklabel the device, it came up with negative numbers for the c partition.

With regards
Andrew

[Ralf Puchner]

it is not a limit on Tru64 side, it is a limit on the controller side.

Please check the supported option list for your hardware (controller, disks etc.). If the disks are not within the supported option list it will not be supported (swxcr supports max. 32GB).

So please do not plugin any hardware without consulting the supported option list!

[Andrew Rycroft]

Hi,

I have just double checked the quickspecs. The KZPCC-AC single port RAID controllers is supported by Tru64UNIX v4.0f with NHD3,and patch kit 6 - we have that. The 146GB disk drive is supported on the KZPCC-AC controller.

From what I am seeing it looks to me like an overflow. The sectors per unit is sectors/unit: -2000977920. I was just wondering what the largest value for this field is, i.e. what is the largest size disk I can create.

With regards
Andrew

[Ralf Puchner]

I can not find a 146GB disk within the supported option list, max. is 72GB.

Use

scu -f /dev/ show capacity

to be sure controller introduces the correct size.

Disklabel uses the controller information if using in autodetect mode. Be sure controller is within the correct slot (64-bit).

[Michael Schulte zur Sur]

Hi,

my assumption would be, that the number of sectors is a 32bit signed integer, which is represented like
signed________unsigned
+2147483646___2147483646
+2147483647___2147483647
-2147483648___2147483648
-2147483647___2147483649

So, try to keep it below 2*1024*1024*1024 blocks.

hth

Michael

[Andrew Rycroft]

HI,

I have since found in the Advfs Quickspec that the maximum volume size is 1 TB - 512 K. I guess this is the limitation.

Thank you for your inputs.

With regards
Andrew

[Ralf Puchner]

so if you reduce the size of the unit to 1TB is should work.