Thursday, September 29, 2005
The 4GB file size barrier
Remember when an 80-character punched card was the standard unit of computer storage? The first disk drive I worked with was the IBM 2311 on an IBM-360 computer. It held 7.25MB. So its capacity was somewhere about 45 standard boxes of 2,000 punched cards. Decent, but not huge. That story continues today. Under Windows, depending on software implementation and disk format configurations, the maximum file size can be 2GB (2,000,000,000,000 bytes), 4GB or just under 16 terabytes (gargantuan). 2GB is decent, but no longer huge. Winsteps users are starting to request file sizes larger than 4GB. For this you need Windows XP with the NTFS disk file format (NT = Windows NT = Network, FS = File System) and a hard drive with at least 12GB of available space. A beta-test version of Winsteps reads and writes these huge files.