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CougarX
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Joined: 18 Dec 2003
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Location: Pennsylvania, US
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 Posted: Mon Jan 19, 2004 8:23 pm Post subject: vfat and file corruption issues |
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Hi all,
I've been having problems with my vfat partition. It seems that every time I try to write a large file to the drive, the file get corrupted. I installed dosfstools, and I use fsck.vfat to check the drive that gives me an error saying that the number of free clusters is incorrect. Basically I am wondering if there is some sort of size limit built into linux (specifically kernel 2.4.23 ck-sources) that would cause this problem. The drive is 200 gig (formatted at about 189 gig with vfat) and this problem only seemed to start once I passed the 150 gig mark (yeah, the drive is pretty full). Also I don't really want to convert out of vfat because I need the compatibility with windows. Speaking of which, windows doesn't seem to have this problem  .
btw, reading and writing work fine otherwise...
Thanks for your help,
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TheCoop
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| Posted: Mon Jan 19, 2004 8:45 pm Post subject: |
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what blocksize did you use in making the partition (-F option)
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CougarX
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Joined: 18 Dec 2003
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| Posted: Mon Jan 19, 2004 10:47 pm Post subject: |
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well when I made the partition I used partition magic, so I don't know the blocksize off hand but maybe this will help
| Code: |
dosfsck 2.10 (22 Sep 2003)
dosfsck 2.10, 22 Sep 2003, FAT32, LFN
Checking we can access the last sector of the filesystem
Boot sector contents:
System ID "MSWIN4.1"
Media byte 0xf8 (hard disk)
512 bytes per logical sector
32768 bytes per cluster
32 reserved sectors
First FAT starts at byte 16384 (sector 32)
2 FATs, 32 bit entries
24887296 bytes per FAT (= 48608 sectors)
Root directory start at cluster 2 (arbitrary size)
Data area starts at byte 49790976 (sector 97248)
6221658 data clusters (203871289344 bytes)
63 sectors/track, 255 heads
63 hidden sectors
398283417 sectors total
Checking for unused clusters.
Checking free cluster summary.
/dev/sda1: 4651 files, 5263474/6221658 clusters
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or maybe this
| Code: |
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda6 36868008 23308784 13559224 64% /
/dev/hda3 20602692 19055232 1547460 93% /home
none 257616 0 257616 0% /dev/shm
/dev/sda1 199093056 168431168 30661888 85% /mnt/storage
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hope that helps 
Thanks Again!
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TheCoop
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| Posted: Mon Jan 19, 2004 11:06 pm Post subject: |
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I mean was it fat16 or fat32?
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CougarX
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| Posted: Tue Jan 20, 2004 12:00 am Post subject: |
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ahh okay, it was fat32
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CougarX
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| Posted: Tue Jan 20, 2004 7:00 am Post subject: |
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humm... I just looked around on google and found some very discouraging information. I also tried to add the sync option to my fstab file hoping that would help, it didn't. Looks like i'm almost out of options.
two links, this first one explains exactly what is happening to my drive.
http://www.knoppix.net/forum/viewtopic.php?t=6326&view=previous
this one gives some filesystem descriptions and a limit of fat32
http://linux.org.mt/article/filesystems#N10059
From the above page here is the quote
| Quote: | Comparison matrix
FAT16 FAT32 NTFS (WindowsNT) HPFS (OS/2)
Windows 9x Compatibility Yes Windows 95SE onwards No No
Windows NT Compatibility Yes Windows 2000 onwards Windows NT 4 onwards Windows NT 3.1-3.51 only
Linux Compatibility Yes Yes Read-only Yes
Maximum Partition Size 2Gb 128Gb 2Tb 2Tb
Maximum File Size 2Gb 4Gb volume size 2Gb |
(visiting the website gives a much better layout, this one is very hard to read)
This sucks, I don't really have a way to back up the data on this drive an repartition, does anyone know if the 2.6 kernel fixes this limitation? Also if I switch to the 2.6 Kernel, is the compatibility better with ntfs, ie read and write safely?
Thanks Again
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