EFS: Difference between revisions

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Created page with "EFS is a 32-bit filesystem introduced in GL2-3.x that provided greater filesystem sizes over the old System III filesystem used in early GL2 releases. However, it's limited to a 8GB volume size and 2GB file size, which led, along with performance and system concerns to its replacement in IRIX 6.0 and 5.3 XFS"
 
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EFS is a 32-bit filesystem introduced in [[GL2-3.x]] that provided greater filesystem sizes over the old System III filesystem used in early GL2 releases. However, it's limited to a 8GB volume size and 2GB file size, which led, along with performance and system concerns to its replacement in IRIX 6.0 and 5.3 XFS
 
'''EFS''' ('''E'''xtent '''F'''ile '''S'''ystem) was the default file system from [[GL2-2.x]] through [[IRIX 5.3]] and for all CD media distributed by SGI.
 
== History ==
 
EFS was introduced in March of 1986 with GL2-W2.4 to replace the System III filesystem. It was deprecated in favor of [[XFS]] beginning with the introduction of IRIX 5.3 XFS in December of 1994 and later [[IRIX 6.0 and 6.1]] in March of 1995 with all subsequent versions of [[IRIX 6.2|IRIX 6.x]] using [[XFS]].
 
== Specifications ==
 
* Block size: 512-bytes
** Block 0: unused or contains a bootstrap program
** Block 1: superblock, contains file system metadata
* Maximum file system size: 8GB (224 or 16777214 blocks)
* Maximum individual file size: 2GB
* Number of fixed-files created by mkfs: 9
 
[[Category:Stubs]]
[[Category: Filesystems]]

Latest revision as of 04:33, 4 October 2025

EFS (Extent File System) was the default file system from GL2-2.x through IRIX 5.3 and for all CD media distributed by SGI.

History

EFS was introduced in March of 1986 with GL2-W2.4 to replace the System III filesystem. It was deprecated in favor of XFS beginning with the introduction of IRIX 5.3 XFS in December of 1994 and later IRIX 6.0 and 6.1 in March of 1995 with all subsequent versions of IRIX 6.x using XFS.

Specifications

  • Block size: 512-bytes
    • Block 0: unused or contains a bootstrap program
    • Block 1: superblock, contains file system metadata
  • Maximum file system size: 8GB (224 or 16777214 blocks)
  • Maximum individual file size: 2GB
  • Number of fixed-files created by mkfs: 9