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with more than 63 drives will result in not all devices in the library being seen (which may include

the library device). The same limitation could be hit with multiple libraries and fewer drives per

library.

IMPORTANT: The maximum number of devices per appliance also impacts on the number of

NAS shares that you can configure. For example: if you configure 250 devices on the HP D2D4312

or D2D4324, you will not be able to configure NAS shares. See also Flexible emulation.

Table 2 Maximum number of libraries and drives per G2 appliance

HP D2D4324HP D2D4312HP D2D4112HP D2D4106HP D2D2504iHP D2D2502i

5050241684Max libraries

20020096643216Max drives per

library

250250120804020Max devices

per appliance

40964096102410249696Max slots per

library

(D2DBS)

NOTE: Apart from the HP D2D2502i, it is possible to exceed the maximum physical limitation

when configuring any of the above models.

Table 3 Maximum number of libraries and drives per G1 appliance

HP D2D4112

HP D2D4004

/4009HP D2D2504iHP D2D2503iHP D2D2502i

2416864Max libraries

44414Max drives per

library

14496484848Max slots per

library (D2DBS)

NOTE: It is only possible to exceed the maximum physical limitation when configuring the HP

D2D4112 Backup System.

Flexible emulation (G2 products only)

If supported, the ESL, EML and D2DBS emulations are particularly flexible because they allow you

to configure a large number of drives per library. This has two main benefits:

• It allows for more concurrent streams on backups which are throttled due to host application

throughput, such as multi-streamed backups from a database.

• It allows for a single library (and therefore dedupe store) to contain similar data from backups

that must run in parallel to increase deduplication ratio.

If using these flexible emulation types, the following factors should also be considered:

• Although there are no hard limits on the number of drives that can be configured per library,

there are limits on the total number of devices and shares that can be configured on an

Flexible emulation (G2 products only) 9

HP D2D User Manual

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