Requirements And Restrictions For Z/Linux - HP XP P9500 Configuration Manual

Requirements and restrictions for z/Linux

In the following example, z/Linux defines the Open Volumes that are connected to FCP as /dev/sd*.
Also, the mainframe volumes (3390-xx) that are connected to FICON are defined as /dev/dasd*.
Figure 1 Example of a RAID Manager configuration on z/Linux
The restrictions for using RAID Manager with z/Linux are:
Command device. RAID Manager uses a SCSI Path-through driver to access the command
device. As such, the command device must be connected through FCP adaptors.
Open Volumes via FCP. You can control the Business Copy and Continuous Access Synchronous
pair operations without any restrictions.
Mainframe (3390-9A) Volumes via FICON. You cannot control the volumes (3390-9A) that
are directly connected to FICON for Business Copy pair operations. Also, mainframe volumes
must be mapped to a CHF port to address target volumes using a command device, as shown
in Figure 1 (page
adaptor.
Business Copy supports only 3390-9A multiplatform volumes. Continuous Access Synchronous
does not support multiplatform volumes (including 3390-9A) via FICON.
Volume discovery via FICON. The inqraid command discovers the FCP volume information by
using SCSI inquiry. FICON volumes can be discovered only by using RAID Manager to convert
the mainframe interface (Read_device_characteristics or Read_configuration_data) to SCSI
Inquiry. As such, the information that is required to run the inqraid command cannot be
implemented, as shown in the following example:
sles8z:/HORCM/usr/bin# ls /dev/dasd* | ./inqraid
/dev/dasda -> [ST] Unknown Ser =
/dev/dasdaa -> [ST] Unknown Ser =
/dev/dasdab -> [ST] Unknown Ser =
sles8z:/HORCM/usr/bin# ls /dev/dasd* | ./inqraid -CLI
DEVICE_FILE
dasda
dasdaa
dasdab
14 Installation requirements
14). The mainframe volume does not have to be connected to an FCP
PORT SERIAL LDEV CTG
- 1920 4
- 62724 4120
- 62724 4121
1920 LDEV = 4 [HTC
62724 LDEV =4120 [HTC
62724 LDEV =4121 [HTC
H/M/12 SSID R:Group PRODUCT_ID
- - 00C0
- - 9810
- - 9810
] [0704_3390_0A]
] [C018_3390_0A]
] [C019_3390_0A]
- 0704_3390_0A
- C018_3390_0A
- C019_3390_0A