Today (July 17, 2017) IBM announced a new mainframe - IBM z14. For details about this important announcement see the announcement letter - here.
z14 is planned to be available on September 13, 2017.
With this announcement "z Systems" is also changed to "IBM Z" (capital letter Z).
In this blog entry I briefly describe the z/VSE support for z14. I know it's a bit early, but if you plan to upgrade, you can already prepare your z/VSE system. You can also see, how z/VSE exploits this new mainframe.
z14 is z/Architecture only.
Up to z13, IPL was done in ESA/390 mode. The operating system decided to switch in z/Architecture mode or stay with ESA/390. Since z/VSE V4 z/VSE switches into z/Architecture mode early during the IPL process.
With z14, IPL is performed in z/Architecture mode only. No switch to ESA/390 mode is possible.
Exception: IPL in z/VM guest
The z/VM operating system offers a restricted ESA/390 compatibility mode for SET MACH ESA
Remark: SET MACH Z = z/Architecture mode IPL
z/VM PTFs need to be applied.
z14 machine type and PSP bucket
The z14 machine type is M/T 3906.
All prerequisites (APARs, considerations, etc.) for z14 are described in the Preventive Service Planning (PSP) bucket (UPGRADE: 3906DEVICE, SUBSET: 3906/ZVSE)
You can search for PSPs here. The z14 PSP is not yet online.
z/VSE supports z14 with z/VSE 5.2 and later.
No PTFs are required to run z/VSE 5.2 or later on z14 (see z/VSE 5.2 IPL / installation on z14 below).
There are PTFs for IOCP, EREP, HLASM. These are listed in the PSP bucket.
z14 offers the new Crypto Express6S card. A z/VSE toleration PTF (z/VSE 5.2, 6.1) is required to use the configurable Crypto Express6S:
- z/VSE 5.2 - APAR DY47715
- z/VSE 6.1 - APAR DY47716
- z/VSE 6.2 - support included, no APAR required
To use the Crypto Express6S card in a z/VM guests, a z/VM PTF is required too.
z/VSE supports the Crypto Express6S in (CCA) coprocessor and accelerator mode.
- More domain support (more than 16 domains) for Crypto Express6S (already introduced with Crypto Express5S):
- More domain support on a z14 means, the Crypto Express6S can be shared among all 85 LPARs.
- The support is already included in above APARs.
- PKCS #11 (EP11) coprocessor is not supported
New FICON Express16S+ (FICON-attached devices and FCP-attached SCSI disks)
The FICON Express16S+ is transparent for z/VSE. It supports 16 Gbps and auto negotiates 8 and 4 Gbps. 2 Gb control units cannot be attached.
z/VSE supports 3 modes of operation:
- CHPID FC for FICON attachment (tape, ECKD-disk, controller) and CTC (channel-to-channel)
- CHPID FCP for FCP-attached SCSI disks
- CHPID FC for zHPF (High Performance FICON) - support planned for z/VSE 6.2
New OSA-Express6S family of cards.
The OSA cards are transparent for z/VSE. z/VSE supports CHPID TYPE OSC, OSD, OSE, OSX
Carry forward OSA cards are OSA Express4S and later. All can be configured using OSA/SF in z14 HMC.
That is the OSA/SF software product is not required.
Vector Facility SIMD (Single Instruction Multiple Data) support - introduced with z13
Supported for user applications planned for z/VSE 6.2
QVS Support for absolute group capping (already on z13):
APAR DY47646 - z/VSE 5.2
APAR DY47647 - z/VSE 6.1
z/VSE 5.2 IPL / installation on z14
- z/VSE 5.2 on ECKD DOSRES / SYSWK1 in LPAR mode
For the Attention Routine (AR) REIPL command a PTF is required: APAR for REIPL - DY47722
- Automatic Installation of z/VSE 5.2 in LPAR and ECKD DOSRES:
After restore of IJSYSR1 is complete (message on console), system enters hardwait FFD (because REIPL fails).
After restore of IJSYSR1, when system entered hardwait, IPL DOSRES device manually.
Automatic installation continues without problems (both installation disk and tape)
- z/VSE 5.2 on SCSI / FBA in LPAR mode
- z/VSE 5.2 on ECKD / SCSI / FBA on z/VM
z/VSE customers need to use the latest SCRT version.
z/VSE, VSE/ESA releases out of service
APAR DY47654 (PTF UD54170) must be applied before IPL on a z14 can be performed.
AR REIPL (in LPAR on ECKD) is not possible. Patch available in APAR DY47722.
Initial Installation of z/VSE 5.1 is NOT possible.
- In LPAR mode: z/VSE V4 can not be IPLed.
- In z/VM guest: z/VSE V4 can be IPLed in z/VM ESA/390 compatibility mode - SET MACH ESA
z/VSE V3 and VSE/ESA in LPAR or z/VM guest:
All those releases can not IPL / do not run on z14.
The z/VSE status pages will be updated the next days.
z14 PTFs are required for z/VM 6.3 and 6.4.