Bug 114431
| Summary: | mke2fs fails creation of 1k blocks when not on cylinder boundry | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 2.1 | Reporter: | Mike Cooling <cooling> |
| Component: | kernel | Assignee: | Jim Paradis <jparadis> |
| Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 2.1 | CC: | ckloiber, peterm |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-12-05 20:17:37 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
I noticed that the "short write" occurs several sectors (more than 1k, I could have accepted it if it was less than 1k, say a disk with an odd number of sectors) prior to the end of the disk, so I was thinking that perhaps the partition table may believe the disk is slightly larger than it is. Making the partition end on the cylinder prior to the end of the disk seems to work and supports my theory, but that's all it is at this point. The customer has a workaround for the error (manually creating the last partition), but we'd both like to see this get fixed. Thanks. The partition and disk information is coming from the kernel. Assigning to kernel. This issue is outside the scope of the current support status for RHEL2.1. No fix is planned. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) Description of problem: This problem goes back to bugzilla 59492 in RH 7.1, but now I have more info. Using the standard installation dialog for RH AS 2.1, I created partitions on my hard disk with relative sizes I have been using on other systems. I have an application which created millions of very small files, and therefore I need to create 1k blocks rather than 4k blocks on a filesystem rather than the default 4k blocks. I received the following error: # mke2fs -b 1024 /dev/sda6 mke2fs 1.26 (3-Feb-2002) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 1702912 inodes, 13617670 blocks 680883 blocks (5.00%) reserved for the super user First data block=1 1663 block groups 8192 blocks per group, 8192 fragments per group 1024 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409, 663553, 1024001, 1990657, 2809857, 5120001, 5971969 mke2fs: Attempt to write block from filesystem resulted in short write zeroing block 13617664 at end of filesystem Here was my partition map: Disk /dev/sda: 254 heads, 63 sectors, 2221 cylinders Units = cylinders of 16002 * 512 bytes Device Boot Start End Blocks Id System /dev/sda1 * 8 327 2560320 83 Linux /dev/sda2 328 455 1024128 82 Linux swap /dev/sda3 456 2221 14129766 5 Extended /dev/sda4 1 7 55975+ fe LANstep /dev/sda5 456 519 512032+ 83 Linux /dev/sda6 520 2221 13617670+ 83 Linux Redhat Support suggested this might work if the partition was on a cylinder boundry. I found a similar system, but with 9gig disks rather than 18gig disks. It also could not build a 1k block file system on partition /dev/sda7. I redid the partitions as follows: Disk /dev/sda: 255 heads, 63 sectors, 1106 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 256 2056288+ 83 Linux /dev/sda2 257 1106 6827625 5 Extended /dev/sda5 257 342 690763+ 82 Linux swap /dev/sda6 343 573 1855476 83 Linux /dev/sda7 574 1106 4281291 83 Linux Now mke2fs works: [root@webct98 root]# mke2fs -b 1024 -i 2048 /dev/sda7 mke2fs 1.27 (8-Mar-2002) Filesystem label= OS type: Linux Block size=1024 (log=0) Fragment size=1024 (log=0) 2142208 inodes, 4281291 blocks 214064 blocks (5.00%) reserved for the super user First data block=1 523 block groups 8192 blocks per group, 8192 fragments per group 4096 inodes per group Superblock backups stored on blocks: 8193, 24577, 40961, 57345, 73729, 204801, 221185, 401409, 663553, 1024001, 1990657, 2809857 Writing inode tables: done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 23 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. Version-Release number of selected component (if applicable): e2fsprogs-1.26-1.72 How reproducible: Always Steps to Reproduce: 1. create a partition not on a cylinder boundry 2. run mke2fs with parameters shown above 3. Additional info: See Redhat Support service request 280194. Also see bugzilla 59492.