schmitz@umn-cs.cs.umn.edu (Thomas Schmitz) (02/15/88)
Is there any way to determine the interleave factor of the disk on an AT clone, short of asking the person who formatted it? -- Tom Schmitz ARPA: schmitz@zeus.cs.umn.edu 2111 21st Avenue South UUCP: ...!rutgers!umn-cs!schmitz Minneapolis, MN 55404 CSNET: schmitz%zeus%umn-cs.arpa@relay.cs.net (612) 340-1855
timothym@tekigm2.TEK.COM (Timothy D Margeson) (02/23/88)
In article <3942@umn-cs.cs.umn.edu> schmitz@umn-cs.cs.umn.edu (Thomas Schmitz) writes: >Is there any way to determine the interleave factor of the disk >on an AT clone, short of asking the person who formatted it? >-- Tom Schmitz Hi, An emphatic NO is appropriate here. You can guess by using past experience tho. 220 to 250 kilobytes/sec. rates an interleave of 2 on an AT type controller. 160 to 190 kilobytes/sec. rates an interleave of 3 on ditto, 130 to 150 kbps is a 4:1. These three are the most commonly used numbers. A special track buffering controller (WD1006) that will allow 1:1 interleaves will yield transfer rates upwards of 400 kbps. Use a program like CORETEST to see what your transfer rate is, then go from there. -- Tim Margeson (206)253-5240 PO Box 3500 d/s C1-937 @@ 'Who said that?' Vancouver, WA. 98668 {amd..hplabs}cae780!tektronix!tekigm2!timothym (this changes daily)
Ralf.Brown@B.GP.CS.CMU.EDU (02/24/88)
In article <2555@tekigm2.TEK.COM>, timothym@tekigm2.TEK.COM (Timothy D Margeson) writes: }In article <3942@umn-cs.cs.umn.edu> schmitz@umn-cs.cs.umn.edu (Thomas Schmitz) writes: }>Is there any way to determine the interleave factor of the disk }>on an AT clone, short of asking the person who formatted it? }>-- Tom Schmitz } }Hi, } }An emphatic NO is appropriate here. You can guess by using past experience tho. } }220 to 250 kilobytes/sec. rates an interleave of 2 on an AT type controller. }160 to 190 kilobytes/sec. rates an interleave of 3 on ditto, }130 to 150 kbps is a 4:1. These three are the most commonly used numbers. }-- }Tim Margeson (206)253-5240 }{amd..hplabs}cae780!tektronix!tekigm2!timothym (this changes daily) Try these two small programs to determine interleave. SPINTIME.COM determines how close to 3600 rpm the disk is spinning, and (if the rate comes up close to 3600) SPINTEST.COM tells you the interleave. If the rate from SPINTIME.COM is not close to 3600, the results from SPINTEST will be garbage. Filename Length Method Size Ratio Date Time CRC -------- ------ ------ ------ ----- ---- ---- --- SPINTEST.COM 305 Crunched 288 6% 03-27-87 21:17:50 6A48 SPINTIME.COM 162 Packed 159 2% 03-27-87 20:52:42 CB2A begin 644 interlev.arc M&@A34$E.5$535"Y#3TT`(`$``'L..:I(:C$!```,_'C%4*!K5P!:"9J%H(5`/ M%J!F$W2%$"!'"J!P/Q`YJ!7`US0`L`*@2P*`%H!F&J2`XHC.1\F3&K"L$)9'A MP#UL`0S<"N"DCK=0.V,9F(9NU,X9TGY9$XD#0*A9`>[9V'G/!,=?_D2>`*"+P MV<&$(9J!H"6`T;)`PTA!"#0.`#Q'PV9LRQ6`*Z"3$2?*Z38LEP(`4!8)0WHOB MWI;`PPH#$@;C":`>+.CH0U1!RR!]`.J(ZP$@,U\`>#KC^^>V@8(I<-*XH5)F) M#AW59US()F%:`0A("'2`D%/&SALV=5Z_<3,'!)TWN\N$(0,BC'$Y8<:L86$:` MA'46UJWK%I.'3NOG88B;*2.'-W,XY$',*3-F.!D7IDE,R>.Z3!L01<J_D0-?9 M`0D:`U-024Y424U%+D-/30"?````>PZ5IBK+H@```/R\H@FZ9@&T"<TAZ#D`4 MM`#-&H'"1`2+\K\"`.@I`$>T`,T:.]9U](O'N0H`OX<!,]+W\8#",$^(%3T`2 M`'7QNH(!M`G-(<T@N`$"C,N!PYL0@>,`\([#,]NY`0"Z@`#-$[J2`7+<PPT*- M2&%R9"!D:7-K('-P:6X@<F%T92!I<RXN+B0@D`;Q,B!24$TN#0HD4WES=&5M_ ,($5R<F]R+@T*)!H`? `` end -- {harvard,uunet,ucbvax}!b.gp.cs.cmu.edu!ralf -=-=- AT&T: (412)268-3053 (school) ARPA: RALF@B.GP.CS.CMU.EDU |"Tolerance means excusing the mistakes others make. FIDO: Ralf Brown at 129/31 | Tact means not noticing them." --Arthur Schnitzler BITnet: RALF%B.GP.CS.CMU.EDU@CMUCCVMA -=-=- DISCLAIMER? I claimed something?