IBM Midrange System DS4000 Series User Manual

142 IBM Midrange System Storage Hardware Guide
4.5.1 Maximum file system size
Table 4-7 shows the maximum capacity a logical drive can have and be formatted with a
specific file system.
Table 4-7 Maximum file system size supported by various operating systems
4.5.2 Maximum number of LUNs per host
The maximum number of LUNs that can be assigned to a host depends on the host operating
system type and mapping limit within a storage partition on the DS5000 storage subsystem.
The DS5000 storage subsystem supports 256 LUNs per single storage partition. You can find
more information about storage partitioning in 4.1.4, “Storage partitioning” on page 116.
Table 4-8 lists the operating system limits as well as the limits of the DS5000 storage
subsystem.
Table 4-8 Maximum number of LUNs per host
Operating system File system Size
Linux ext2 32 TB
ext3 32 TB
AIX JFS2 64 PB
Windows NTFS 16 EB
FAT32 8 TB
HP-UX 11i v2 HFS 128 GB
JFS 3.5 2 TB / 32 TB
a
a. VxVM 3.5 only and OnlineJFS license for greater than 2 TB file systems (only HP-UX 11iV2 B.
11.23)
Host operating system type Maximum number of LUNs
per host (theoretical OS limit)
Maximum number of LUNs
per host (DS5000 storage
subsystem limit)
AIX 64000 256
HP-UX 16000 256
Linux 256 256
Windows 256 256
ESX Server 3.5 Update 2 256 256
Note: Keep in mind that the total number of LUNs on a DS5000 storage subsystem cannot
exceed 2048.

IBM Midrange System DS4000 Series Specifications

General

Brand	IBM
Model	Midrange System DS4000 Series
Category	Storage
Language	English