
364 IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
With the capability to support large volumes of up to 65,520 cylinders, there are now two new
standard models. The 3390-27 with 32,760 cylinders and a capacity of approximately 27 GB
and the 3390-54 with 65,520 cylinders and a capacity of approximately 54 GB.
10.6.1 Selecting the volume size
A key factor to consider when planning the CKD volumes configuration and sizes is the 256
device limit per LSS. You need to define volumes with enough capacity, so that you can use
all your installed capacity with at most 256 devices. On ESCON-attached systems the
number of devices can be ...