Comment 14 for bug 442456

Same pb for me:

/var/log/dist-upgrade/main.log
...
2009-11-17 11:21:56,873 DEBUG cache aufs_rw_dir: /tmp/
2009-11-17 11:21:56,874 DEBUG Free space on /: 1639116800
2009-11-17 11:21:56,874 DEBUG Free space on /usr: 1639116800
2009-11-17 11:21:56,874 DEBUG Dir /var mounted on /
2009-11-17 11:21:56,874 DEBUG Dir /boot mounted on /
2009-11-17 11:21:56,875 DEBUG Dir /u/archives mounted on /usr
2009-11-17 11:21:56,875 DEBUG Dir /tmp mounted on /
2009-11-17 11:21:56,875 DEBUG Free space on /home: 1896259584
2009-11-17 11:21:56,876 DEBUG Dir /tmp mounted on /
2009-11-17 11:21:56,876 DEBUG fs_free contains: '{'/var': <DistUpgradeCache.FreeSpace object at 0x95d2f4c>, '/tmp': <DistUpgradeCache.FreeSpace object at 0x95d2f4c>, '/usr': <DistUpgradeCache.FreeSpace object at 0x95d2aec>, '/boot': <DistUpgradeCache.FreeSpace object at 0x95d2f4c>, '/home': <DistUpgradeCache.FreeSpace object at 0x95d2e0c>, '/': <DistUpgradeCache.FreeSpace object at 0x95d2f4c>, '/u/archives': <DistUpgradeCache.FreeSpace object at 0x95d2aec>}'
2009-11-17 11:21:56,975 DEBUG linux-image-2.6.31-15-generic (new-install) added with 15728640 to boot space
2009-11-17 11:21:57,712 DEBUG dir '/u/archives' needs '1827157578.0' of '<DistUpgradeCache.FreeSpace object at 0x95d2aec>' (1639116800.000000)
2009-11-17 11:21:57,712 DEBUG dir '/usr' needs '1030918144.0' of '<DistUpgradeCache.FreeSpace object at 0x95d2aec>' (-188040778.000000)
2009-11-17 11:21:57,712 DEBUG dir '/usr' needs '52428800' of '<DistUpgradeCache.FreeSpace object at 0x95d2aec>' (-1218958922.000000)
2009-11-17 11:21:57,712 DEBUG dir '/boot' needs '15728640' of '<DistUpgradeCache.FreeSpace object at 0x95d2f4c>' (1639116800.000000)
2009-11-17 11:21:57,712 DEBUG dir '/tmp' needs '5242880' of '<DistUpgradeCache.FreeSpace object at 0x95d2f4c>' (1623388160.000000)
2009-11-17 11:21:57,712 DEBUG dir '/' needs '10485760' of '<DistUpgradeCache.FreeSpace object at 0x95d2f4c>' (1618145280.000000)
2009-11-17 11:21:57,713 DEBUG dir '/tmp' needs '0.0' of '<DistUpgradeCache.FreeSpace object at 0x95d2f4c>' (1607659520.000000)
2009-11-17 11:21:57,713 ERROR Not enough free space: ['/u']
2009-11-17 11:22:02,591 DEBUG abort called
2009-11-17 11:22:02,594 DEBUG openCache()
2009-11-17 11:22:06,300 DEBUG /openCache(), new cache size 27061
2009-11-17 11:22:06,301 DEBUG enabling apt cron job

moi@moi:/u/archives> ls -la /var/cache/apt
total 25936
drwxr-xr-x 3 root root 4096 2009-11-17 11:24 .
drwxr-xr-x 21 root root 4096 2009-08-26 11:03 ..
drwxr-xr-x 2 root root 4096 2007-10-23 13:56 apt-file
lrwxrwxrwx 1 root root 11 2009-04-24 10:00 archives -> /u/archives
-rw-r--r-- 1 root root 13428310 2009-11-17 11:25 pkgcache.bin
-rw-r--r-- 1 root root 13125376 2009-11-17 11:24 srcpkgcache.bin

df -h gives :

Sys. de fich. Tail. Occ. Disp. %Occ. Monté sur
/dev/sda2 9,1G 7,1G 1,6G 82% /
tmpfs 1006M 0 1006M 0% /lib/init/rw
varrun 1006M 236K 1006M 1% /var/run
varlock 1006M 0 1006M 0% /var/lock
udev 1006M 152K 1006M 1% /dev
tmpfs 1006M 172K 1006M 1% /dev/shm
/dev/sda5 5,5G 3,5G 1,8G 67% /home
/dev/sda1 87M 7,1M 79M 9% /media/sda1
/dev/sda6 56G 43G 9,9G 82% /u
tmpfs 1006M 2,2M 1004M 1% /lib/modules/2.6.28-16-generic/volatile