Re: 1 Terabyte+ Disk Support?

[Alan Cox]

> 2.2.14-5 Kernel that comes standard with Redhat Linux 6.2. I am trying to 
> determine the best way to patch a pile of Redhat 6.2 (zoot)systems to 
> recognize 1Terabyte and larger disks. I am trying to directly attach 
> 1.5Terabyte (external) RAID arrays to these Redhat 6.2 systems via Ultra160 
> SCSI adapters.

Split them into two arrays

> The cut-off point for large disks in Redhat 6.2 and 7.2 appears to be around 
> 900 Gigabytes, I can get both Redhat 6.2 and 7.2 to see up to around 900 
> gigs as 1 disk. I've heard about a 64-bit IO patch for an older 2.x.x 'pre8' 
> release kernel but would like to know if theres a way to get this 
> accomplished with Redhat 6.2/Kernel 2.2.14-5. Any insight into this problem 
> would be greatly appreciated!

Passing 1Tb wraps the block number in 32bit space. Fixing that to 2Tb has
been done and verified for a few controllers (Leonard Zubkoff did some 
work on that) for current 2.4. Doing it "right" is a 2.5 project.