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DFSMS Disk Storage SW Support

Showing 8

Increase logical paths limit of 512 for Control Unit (HCD message CBDG085I)

We reached the limit of 512 paths for Control Units when disks are shared between multiple sysplexes. DASD volumes are being forced to be accessed by 3 and even 2 channel paths.
5 months ago in z/OS / DFSMS Disk Storage SW Support 3 Future consideration

In the LSPACE macro given the option switch off SVCDUMPs for VTOC errors

Change LSPACE to allow the option to suppress SVCDUMPs for VTOC errors
over 3 years ago in z/OS / DFSMS Disk Storage SW Support 3 Future consideration

Improve error reporting/LOGREC records associated with OBTAIN failure

We recently experienced an issue that involved VTOC corruption which required a ZAP to fix the VTOC. When the error occurred and was reported, there were messages and a LOGREC record that identified the volume involved, but there was no way to kno...
4 months ago in z/OS / DFSMS Disk Storage SW Support 0 Future consideration

ICKDSF utility to include VVDS creation as part of INIT

Why is it useful: VVDS automatically creating immediately upon INIT causing VVDS created with less size, avoid timing issue and avoid automatic VVDS size creation Who will benefit: all the customers use ICDSF INIT, VVDS avoid redefine with customi...
over 2 years ago in z/OS / DFSMS Disk Storage SW Support 2 Future consideration

LISTDATA VOLSPACE from PPRC Secondaries

The command LISTDATA VOLSPACE is not working for PPRC Secondaries located in Subchannel Set 1.We need to query SGCB information from PPRC Secondaries. This is not working:LISTDATA VOLSPACE DEVICE UNITNUMBER(7EA5) SUBCHSET(1) The parameter SUBCHSET...
almost 3 years ago in z/OS / DFSMS Disk Storage SW Support 2 Future consideration

Fail allocation of DASD datasets with BLKSIZE/CISIZE > 32760

Allocation of disk dataset with a blocksize or VSAM CISIZE greater than 32760 should fail at allocation time, rather than at OPEN time.
over 7 years ago in z/OS / DFSMS Disk Storage SW Support 1 Future consideration

Additional information about the status of Cache Fast Write

Currently there is no easy way to be sure, that Cache Fast Write(CFW) is not used on your system. But in the event of an hyperswap CFW can be a problem. Therefore every customer should know their configuration. The problem is that the "DEVSERV P" ...
over 1 year ago in z/OS / DFSMS Disk Storage SW Support 1 Future consideration

SDB not working as advertised

SDB not working as advertised as below from ISMF: HELP-------------------- SYSTEM DETERMINED BLOCKSIZE -------------------HELPCOMMAND ===> Use the SYSTEM DETERMINED BLOCKSIZE (SDB) field to specify that the system determined blocksize should be...
over 5 years ago in z/OS / DFSMS Disk Storage SW Support 2 Future consideration

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