IBM DS8800, Введение и руководство по планированию, Страница: 38 / 256

DS8800
Along with SSD drives, the DS8800 supports Serial Attached SCSI
(SAS) drives, available in the following capacities:
v
300 GB 15K drive set
v 900 GB 10K drive set
v
3 TB 7.2K drive set
DS8700
Fibre Channel, SSD, and Serial Advanced Technology Attachment
(SATA) drives. SATA drives are both the largest and slowest of the
drives available for the DS8000. SATA drives are best used for
applications that favor capacity optimization over performance. (2
TB SATA drive support is available for the DS8700.)
Notes:
1.
RAID 5 implementations are not compatible with the
use of SATA disk drives. RAID 6 and RAID 10
implementations are compatible with the use of SATA
disk drives.
2. SATA and nearline SAS drives are not recommended for
Space-Efficient FlashCopy repository data because of
performance impacts.
Sign-on support using Lightweight Directory Access Protocol (LDAP)
The DS8000 provides support for both unified sign-on functions (available
through the DS Storage Manager), and the ability to specify an existing
Lightweight Directory Access Protocol (LDAP) server. The LDAP server
can have existing users and user groups that can be used for authentication
on the DS8000.
Setting up unified sign-on support for the DS8000 is achieved using the
Tivoli Storage Productivity Center. See the Tivoli Storage Productivity
Center Information Center for more information.
Note: Other supported user directory servers include IBM Directory Server
and Microsoft Active Director.
Easy Tier
Easy Tier is designed to determine the appropriate tier of storage based on
data access requirements and then automatically and nondisruptively move
data, at the subvolume or sub-LUN level, to the appropriate tier on the
DS8000. Easy Tier is an optional feature on the DS8700 and the DS8800 that
offers enhanced capabilities through features such as auto-rebalancing, hot
spot management, rank depopulation, support for extent space-efficient
(ESE) volumes, auto performance rebalance in both homogeneous and
hybrid pools, and manual volume migration.
Multitenancy support (resource groups)
Resource groups functions provide additional policy-based limitations to
DS8000 users, which in conjunction with the inherent volume addressing
limitations support secure partitioning of copy services resources between
user-defined partitions. The process of specifying the appropriate
limitations is performed by an administrator using resource groups
functions. DS Storage Manager (GUI) and DS CLI support is also available
for resource groups functions.
16
Introduction and Planning Guide