Reaching Beyond Two-Terabyte Filesystems

Jeremy Andrews writes: "Peter Chubb posted a patch to the lkml, with which he's now managed to mount a 15 terabyte file (using JFS and the loopback device). Without the patch, Peter explains, "Linux is limited to 2TB filesystems even on 64-bit systems, because there are various places where the block offset on disc are assigned to unsigned or int 32-bit variables." Peter works on the Gelato project in Australia. His efforts include cleaning up Linux's large filesystem support, removing 32-bit filesystem limitations. When I asked him about the new 64-bit filesystem limits, he offered a comprehensive answer and this interesting link. The full thread can be found here on KernelTrap. Reaching beyond terabytes, beyond pentabytes, on into exabytes. I feel this sudden discontent with my meager 60 gigabyte hard drive..."

Comments

Re:xfs for linux

[maswan]

To quote from that page you just linked to:

Maximum Filesystem Size
For Linux 2.4, 2 TB. As Linux moves to 64 bit on block devices layer, filesystem limits will increase.

This is exactly this problem that was adressed with that patch referenced in the story.