A430@HASARA11.BITNET (Dept. of Mol. Biology, Section of Mol. Cytology) (08/29/90)
I tried to expand our disk capacity with a MAXTOR XT4380S 380Mb scsi drive connected to Apollo DN2500. Results : Sometimes it works (formatting, booting from disk etc.) and sometimes it doesn't (I then get errors like 'controller not found' when running 'TE' with the node shut). Can anyone (with a similar experience) give me some advice ? (I tried things like positioning the drive upside down or sideways, made sure everything was cooled properly used all possible device numbers and kept the same problems both of the two MAXTOR drives I used). Thanks in advance, Jeroen Heijmink Department of Molecular Cell Biology Section of Molecular Cytology University of Amsterdam Email: A430@HASARA11.BITNET
lampi@polari.UUCP (Michael Lampi) (08/30/90)
In article <90239.151505A430@HASARA11.BITNET> A430@HASARA11.BITNET Jeroen Heijmink of (Dept. of Mol. Biology, Section of Mol. Cytology) writes: >I tried to expand our disk capacity with a MAXTOR XT4380S 380Mb scsi drive >connected to Apollo DN2500. Results : >Sometimes it works (formatting, booting from disk etc.) and sometimes it >doesn't (I then get errors like 'controller not found' when running 'TE' >with the node shut). > It sounds like you might be having general SCSI bus communications problems. I'd suggest you check the cable(s) between the DN-2500 and the Maxtor. Make sure that they don't exceed 6 meters in length (total), that they are shielded (copper braid and/or foil; having both is best), that they are twisted pair, and that the connectors are tightly secured. Another trouble area is with termination. There should be a set of terminator resistors at each end of the SCSI bus, and none in between, for a total of two sets of terminators. If you have internal disks, then the terminators should be on the last disk inside and on your Maxtor disk outside (assuming the Maxtor is at the end of the SCSI cable). The terminator on the DN-2500 cpu board should be removed. However, if you have no internal disks, then the terminator should remain on the cpu board and on the Maxtor disk. As far as SCSI ID's are concerned, don't use ID 7, which is reserved for the DN-2500. Michael Lampi