Specifications
Windows has different specifications for LUNs and file systems. Table 2-2 lists the limitations on the number of LUNs. Table 2-3 lists specifications of NTFS with GPT disks.
OS |
OS Kernel Limitation |
HBA Limitation |
|---|---|---|
Windows Server 2008 Windows Server 2008 R2 |
|
4096 LUNs per target (Emulex) 256 LUNs per target (QLogic) |
Windows Server 2012 to 2019 |
|
4096 LUNs per target (Emulex) 256 LUNs per target (QLogic) |
You can obtain more HBA limitations from its manufacturer.
Allocation Unit Size |
Max. NTFS Volume Size |
|---|---|
512 |
2,199,023,255,040 (2 TB) |
1024 |
4,398,046,510,080 (4 TB) |
2048 |
8,796,093,020,160 (8 TB) |
4096 |
17,592,186,040,320 (16 TB) |
8192 |
35,184,372,080,640 (32 TB) |
16,384 |
70,368,744,161,280 (64 TB) |
32,768 |
140,737,488,322,560 (128 TB) |
65,536 |
281,474,976,645,120 (256 TB) |
Table 2-3 lists only part of NTFS specifications. For more information about specifications of each file system, see the corresponding Microsoft document, for example, NTFS Overview.