Terry, So you're saying that with IBM Storage, CFW is not remitted to the Remote Storage. If you turn it off then it just becomes another DFW.
With HDS this was always an option. BTW, CFW will be destaged to disk just like any other write. A cache Fast write is only written to Cache and not NVS. For IBM it means you reduce load on the NVS, and for HDS you can reduce Global Cache usage. For EMC it doesn't make a difference - there's only one copy in pre-DMX3, and beginning with DMX3 there is two copies of everything. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Traylor, Terry > Sent: Saturday, January 19, 2008 6:40 PM > To: IBM-MAIN@BAMA.UA.EDU > Subject: Re: [IBM-MAIN] CFW with Syncsort > > Here's the answer to the first half of your question. > > Disk write operations using CFW (Cache Fast Write) are written into > cache but not to > the disk. Having CFW operations in progress at the time a HyperSwap > occurs can yield > unpredictable results since there is no corresponding mirrored cache > content in the > secondary disk subsystem. > > I don't know enough about NVS to comment. Perhaps, others will be so > kind as to enlighten us. > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
