Re: CKD details

sme...@gmu.edu (Seymour J Metz) writes: > The 3330 was not the first disk drive with Set Sector; that honor > belongs to the 2305, formally part of the S/360 series rather than the > S/370, although I imagine that a lot more were sold for use on, e.g., > 370/165, than for 85 or 195. re:

Re: CKD details

From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of Ron hawkins <ronjhawk...@sbcglobal.net> Sent: Wednesday, January 24, 2018 5:59 PM To: IBM-MAIN@listserv.ua.edu Subject: Re: CKD details Tony, I am way in over my head here, and I am sure I will u

Re: CKD details

On 24 January 2018 at 17:59, Ron hawkins wrote: > Tony, > > I am way in over my head here, and I am sure I will use the wrong terminology. Not to worry. I'm sure I've got things wrong too. And the old memory isn't what it once was... > As I remember it RPS was

Re: CKD details

Tony, I am way in over my head here, and I am sure I will use the wrong terminology. As I remember it RPS was implemented by passing seek and set sector to the DASD together so there was only one disconnect sequence? Without RPS there was a disconnect/reconnect sequence for the seek, followed

Re: CKD details

@listserv.ua.edu Sent: 24-Jan-18 4:55:25 PM Subject: Re: CKD details There's certainly no requirement to use Set Sector on any disk drive, but I question whether the 2860 could handle the data rate of a 2305. BTW, a company called CIG had a block multiplexor channel that you could attach to a 360/

Re: CKD details

From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of Tony Harminc <t...@harminc.net> Sent: Wednesday, January 24, 2018 1:28 PM To: IBM-MAIN@listserv.ua.edu Subject: Re: CKD details On 24 January 2018 at 10:57, Seymour

Re: CKD details

On 24 January 2018 at 10:57, Seymour J Metz wrote: I wrote: >> What use is Set Sector without a block multiplexor channel (which >> allows disconnect/reconnect)? Were those available for some S/360 >> models? > Of course they were available; the model number for the 230 should be

Re: CKD details

sme...@gmu.edu (Seymour J Metz) writes: > The 3330 was not the first disk drive with Set Sector; that honor > belongs to the 2305, formally part of the S/360 series rather than the > S/370, although I imagine that a lot more were sold for use on, e.g., > 370/165, than for 85 or 195. re:

Re: CKD details

From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of Tony Harminc <t...@harminc.net> Sent: Tuesday, January 23, 2018 6:37 PM To: IBM-MAIN@listserv.ua.edu Subject: Re: CKD details On 23 January 2018 at 13:56, Seymour J Metz <sme...

Re: CKD details

On 23 January 2018 at 13:56, Seymour J Metz wrote: > The 3330 was not the first disk drive with Set Sector; that honor belongs to > the 2305, formally part of the S/360 series rather than the S/370, although I > imagine that a lot more were sold for use on, e.g., 370/165, than

Re: CKD details

sme...@gmu.edu (Seymour J Metz) writes: > The 3330 was not the first disk drive with Set Sector; that honor > belongs to the 2305, formally part of the S/360 series rather than the > S/370, although I imagine that a lot more were sold for use on, e.g., > 370/165, than for 85 or 195. re:

Re: CKD details

is now a part of Syncsort. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Seymour J Metz Sent: Tuesday, January 23, 2018 2:04 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD details Shirley you mean cells. A single sector might contain

Re: CKD details

behalf of Christopher Y. Blaicher <cblaic...@syncsort.com> Sent: Tuesday, January 23, 2018 9:48 AM To: IBM-MAIN@listserv.ua.edu Subject: Re: CKD details With all I put in the last post, I forgot to answer WHY 20 sectors at a minimum for a record. It is because at a minimum a record consist

Re: CKD details

From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of Anne & Lynn Wheeler <l...@garlic.com> Sent: Tuesday, January 23, 2018 12:59 PM To: IBM-MAIN@listserv.ua.edu Subject: Re: CKD details t...@harminc.net (Tony Harm

Re: CKD details

t...@harminc.net (Tony Harminc) writes: > I assume it is the value used in the Set Sector/Read Sector CCWs. This > came with the 3330 (real "analogue" disk) and is part of Rotational > Position Sensing (RPS). It should have no logical relationship to the > cell size; it's just a logical position

Re: CKD details

On 23 January 2018 at 10:22, R.S. wrote: > Fortunately your explanation was clear enough to find out each "mini-record" > has at least 10 cells (9 control plus a t least one for data). > > However you used word "SECTORS". I used "34-byte DATA CELL", following the

Re: CKD details

W dniu 2018-01-23 o 17:50, Anne & Lynn Wheeler pisze: cblaic...@syncsort.com (Christopher Y. Blaicher) writes: Your right, things are a little confusing. SECTORS - Think of it as 224 pieces of pie. It is, I believe, physical. CELL - Also physical, but I think of them as little chunks of data,

Re: CKD details

cblaic...@syncsort.com (Christopher Y. Blaicher) writes: > Your right, things are a little confusing. > SECTORS - Think of it as 224 pieces of pie. It is, I believe, physical. > CELL - Also physical, but I think of them as little chunks of data, > which may be your data or control data for the

Re: CKD details

- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of R.S. Sent: Tuesday, January 23, 2018 10:22 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD details Fortunately your explanation was clear enough to find out each "mini-record" has at least 10 cells

Re: CKD details

cher Sent: Tuesday, January 23, 2018 8:30 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD details See the following for how to calculate a sector https://www.ibm.com/support/knowledgecenter/en/SSB27H_6.2.0/fa2mr_sectval.html Question 2: why 20 sectors at a minimum. It's a long answer. We tend

Re: CKD details

is now a part of Syncsort. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Christopher Y. Blaicher Sent: Tuesday, January 23, 2018 8:30 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD details See the following for how to calculate

Re: CKD details

@LISTSERV.UA.EDU] On Behalf Of R.S. Sent: Tuesday, January 23, 2018 7:15 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD details Another set of questions: 1. What is sector??? 3390 specification says it has 224 sectors per track (3380 had 222 sectors per track). I cannot find any explanation

Re: CKD details

Another set of questions: 1. What is sector??? 3390 specification says it has 224 sectors per track (3380 had 222 sectors per track). I cannot find any explanation for that. Size of data cell is 34 bytes 2. In the 3390 reference I read the record can occupy 20 to 1729 data cells (excluding

Re: CKD details

is now a part of Syncsort. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of R.S. Sent: Monday, January 22, 2018 12:34 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD details W dniu 2018-01-22 o 16:49, Christopher Y. Blaicher pisze

Re: CKD details

On 22 January 2018 at 09:51, R.S. wrote: > I'm looking for some reference describing track format of CKD disk. > > What I know is > Index Point - Home Address - R0 - other Rn > > Some questions: > 1. IP is just a "start of track", contains no data - Y/N ? > 2. What

Re: CKD details

W dniu 2018-01-22 o 16:49, Christopher Y. Blaicher pisze: [...] Extended format data sets use a modified form and here each letter is a nibble: cccHRRKK Still 8 bytes [...] I think you mean EAV, not extended format - is it right? Regards -- Radoslaw Skorupka Lodz, Poland

Re: CKD details

10965 www.syncsort.com Data quality leader Trillium Software is now a part of Syncsort. -Original Message- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of R.S. Sent: Monday, January 22, 2018 10:22 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: CKD

Re: CKD details

Thank you for prompt response, I appreciate it. Further question: what is CCHHRKDD? CCHHR is clear (Cylinder, Head, Record), but KDD? Is it Key Data x2? -- Radoslaw Skorupka Lodz, Poland W dniu 2018-01-22 o 16:13, Christopher Y. Blaicher pisze: See manual SA22-1025-00 and comments below

Re: CKD details

See manual SA22-1025-00 and comments below Chris Blaicher Technical Architect Mainframe Development P: 201-930-8234 | M: 512-627-3803 E: cblaic...@syncsort.com Syncsort Incorporated 2 Blue Hill Plaza #1563 Pearl River, NY 10965 www.syncsort.com Data quality leader Trillium Software is now a