Have you got enough free disk space for the chunk?
Use the utility which ships with your version of Unix to check for free disk space. (SCO is df or dfspace, while Linux uses df -h). Check the documentation for the correct command to use in order to determine the amount of free disk space.
Take note that in some cases you must be logged in as root to get correct results.
Examples : SCO
/ : Disk space: 1202.03 MB of 1871.09 MB available (64.24%).
/stand : Disk space: 8.93 MB of 19.53 MB available (45.77%).
/exp1 : Disk space: 4685.71 MB of 7812.49 MB available (59.98%).
/wrk1 : Disk space: 3389.16 MB of 3498.97 MB available (96.86%).
Total Disk Space: 9285.85 MB of 13202.09 MB available (70.34%).