Yes. Replacing LINEAR with ZFS does the required formatting. It's a one step process rather than a two step. The old two step process still works however.
Mark Jacobs Sent from ProtonMail, Swiss-based encrypted email. GPG Public Key - https://api.protonmail.ch/pks/lookup?op=get&[email protected] On Friday, October 24th, 2025 at 12:41 PM, Colin Paice <[email protected]> wrote: > In the past when I used linear I also had to format it with > //FORMATFS EXEC PGM=IOEAGFMT,REGION=0M,COND=(0,NE,DEFINE), > // PARM=('-aggregate COLIN.ZOPEN.ZFS ') > //* PARM=('-aggregate COLIN.ZOPEN.ZFS -compat') > //SYSPRINT DD SYSOUT=* > //STDOUT DD SYSOUT=* > //STDERR DD SYSOUT=* > Then it would mount > Are you saying the IDCAMS define .. ZFS does the format for you? > Colin > > On Fri, 24 Oct 2025 at 17:23, Mark Jacobs < > [email protected]> wrote: > > > DEFINE CLUSTER (NAME(A2MJAET.TEST.ZFS) - > > > > CYL(1 1) SHAREOPTIONS(3) LINEAR) > > > > IGD01009I ACSMC02W DATASET HAS BEEN ALLOCATED WITH STD0 MANAGEMENT CLASS > > IGD01009I MSG07 MANAGEMENT CLASS ASSIGNED STD0 > > IGD17070I DATA SET A2MJAET.TEST.ZFS > > ALLOCATED SUCCESSFULLY WITH 1 STRIPE(S). > > IGD17172I DATA SET A2MJAET.TEST.ZFS > > IS ELIGIBLE FOR EXTENDED ADDRESSABILITY > > IDC0508I DATA ALLOCATION STATUS FOR VOLUME ITFA1H IS 0\ > > IDC0512I NAME GENERATED-(D) A2MJAET.TEST.ZFS.DATA > > IDC0181I STORAGECLASS USED IS S1 > > IDC0181I MANAGEMENTCLASS USED IS STD0 > > IDC0181I DATACLASS USED IS EAVSAM > > > > IDC0001I FUNCTION COMPLETED, HIGHEST CONDITION CODE WAS 0 > > > > IDC0002I IDCAMS PROCESSING COMPLETE. MAXIMUM CONDITION CODE WAS 0 > > > > mount filesystem('A2MJAET.TEST.ZFS') mountpoint('/u/A2MJAET/mount') > > type(zfs) > > > > BPXF135E RETURN CODE 00000079, REASON CODE EF016C54. THE MOUNT FAILED FOR > > FILE > > > > SYSTEM A2MJAET.TEST.ZFS. > > > > zFS Mon Oct 28 19:01:32 EDT 2024 > > > > Description: The VSAM LDS is not formatted, is not marked as intended for > > zFS, > > > > and cannot be formatted at mount. > > > > Action: Format the VSAM LDS using the zfsadm format command and try the > > mount > > > > again. > > > > Sent from ProtonMail, Swiss-based encrypted email. > > > > GPG Public Key - > > https://api.protonmail.ch/pks/lookup?op=get&[email protected] > > > > On Friday, October 24th, 2025 at 12:13 PM, Jousma, David < > > [email protected]> wrote: > > > > > Mark, > > > > > > This is not true. Just ran this today > > > > > > DEFINE CLUSTER(NAME(OMVSU.TEC1.DB2AAAS.SERVICE) - > > > LINEAR - > > > STORCLAS(SCSYSTEM) - > > > MB(500) SHAREOPTIONS(3,3)) > > > > > > _______________________________ > > > > > > Dave Jousma > > > > > > Vice President | Director, Technology Engineering > > > > > > Fifth Third Bank | 1830 East Paris Ave, SE | Grand Rapids, MI 49546 > > > > > > From: IBM Mainframe Discussion List [email protected] on behalf > > > of Mark Jacobs [email protected] > > > > > > Date: Friday, October 24, 2025 at 12:05 PM > > > To: [email protected] [email protected] > > > > > > Subject: Re: Configuring ZFS data sets > > > > > > CAUTION EXTERNAL EMAIL > > > This message came from outside your organization. > > > DO NOT open attachments or click on links from unknown senders or > > > unexpected emails. > > > Report Suspicioushttps:// > > > us-phishalarm-ewt.proofpoint.com/EWT/v1/MwwqYLOC6b6whF7V!pHOFdhTiQyxKmg4Sp3Khl3g01dPae3MCOKFTSygwHwVMMJldFfDtH8cHbZCBsgYxyEXY-pNuyHr4hrYm0DzxrDU_kZCccsCs-rpIrbKAl8YXv-8pqDzqEs_GHBP97QbilUmeSx3JT0tI6fAM7204m2hSpfbR-6-RdL9PEUyaTTCv7jQNBsCPvNqxDlRsaBJsG5Ct_2MmfQ$ > > > > > > Using LINEAR won't work. You need to specify ZFS if you use IDCAMS to > > > define a zfs file system. Your template JCL is the older/original method > > > of > > > defining a ZFS file system. It still works, but IDCAMS IMHO is easier. > > > > > > Mark Jacobs > > > > > > Sent from ProtonMail, Swiss-based encrypted email. > > > > > > GPG Public Key - > > > https://urldefense.com/v3/__https://api.protonmail.ch/pks/lookup?op=get&[email protected]__;!!MwwqYLOC6b6whF7V!jj7sDnkR1VbeVWs3xMbs0oaynKGHtpHNyinibMu7S8iVyZTy3_rMiz0hwgrx6hFnjmYx0qH6XXbCu6JRqw7wfPvaMi1gu72LVoc$ > > > > > > On Friday, October 24th, 2025 at 11:46 AM, Colin Paice > > > [email protected] wrote: > > > > > > > I'm about to set up some new ZFS data sets > > > > Is there any guidance on the best way of doing it? > > > > - My DEFINE cluster has LINEAR - but I see there is a ZFS option. Does > > > > it > > > > really make a difference? > > > > - My template JCL has "-compat" in it. Is this recommended ? > > > > Are there any performance options I should be enabling? > > > > Colin > > > > > > > > ---------------------------------------------------------------------- > > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > > > ---------------------------------------------------------------------- > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > > > This e-mail transmission contains information that is confidential and > > > may be privileged. It is intended only for the addressee(s) named above. > > > If > > > you receive this e-mail in error, please do not read, copy or disseminate > > > it in any manner. If you are not the intended recipient, any disclosure, > > > copying, distribution or use of the contents of this information is > > > prohibited. Please reply to the message immediately by informing the > > > sender > > > that the message was misdirected. After replying, please erase it from > > > your > > > computer system. Your assistance in correcting this error is appreciated. > > > > > > ---------------------------------------------------------------------- > > > For IBM-MAIN subscribe / signoff / archive access instructions, > > > send email to [email protected] with the message: INFO IBM-MAIN > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
