Features

SUSE Linux Enterprise Server 15 SP5 LPAR mode z/VM guest KVM guest

The DASD device driver supports a wide range of disk devices and disk functions.

  • The DASD device driver has no dependencies on the adapter hardware that is used to physically connect the DASDs to the IBM® Z hardware. You can use any adapter that is supported by the IBM Z hardware (see www.ibm.com/systems/support/storage/ssic/interoperability.wss for more information).
  • The DASD device driver supports ESS virtual ECKD type disks
  • The DASD device driver supports the control unit attached physical ECKD (Extended Count Key Data) and FBA (Fixed Block Access) devices as summarized in Table 1:
    Table 1. Supported control unit attached DASD
    Device format Control unit type Device type
    ECKD 1750 3380 and 3390
    ECKD 2107 3380 and 3390
    ECKD 2105 3380 and 3390
    ECKD 3990 3380 and 3390
    ECKD 9343 9345
    ECKD 3880 3390
    FBA 6310 9336
    FBA 3880 3370

    All models of the specified control units and device types can be used with the DASD device driver. This includes large devices with more than 65520 cylinders, for example, 3390 Model A. Check the storage support statement to find out what works for SUSE Linux® Enterprise Server 15 SP5.

  • The DASD device driver provides a disk format, the IBM Z® compatible disk layout, with up to three partitions per disk.
  • The DASD device driver provides an option for extended error reporting for ECKD devices. Extended error reporting can support high availability setups.
  • The DASD device driver supports parallel access volume (PAV) and HyperPAV on storage devices that provide this feature. The DASD device driver handles dynamic PAV alias changes on storage devices. For more information about PAV and HyperPAV, see How to Improve Performance with PAV, SC33-8414. Use the dasdstat command to check whether a DASD uses PAV.
  • The DASD device driver supports High Performance FICON®, including multitrack requests, on storage devices that provide this feature. Use the dasdstat command to check whether a DASD uses High Performance FICON.
  • The DASD device driver supports extent space efficient (ESE) DASDs, see Managing extent space efficient DASDs.