On 03/27/2018 03:22 PM, Aaron Jackson wrote: >>>>> So, from what I can see, the drive should spin up correctly, but for >>>>> some reason it goes into fault mode. I am right in thinking that upon >>>>> load, the heads should continue moving forward until the first track is >>>>> found, right? I should not have to perform a seek manually from the PDP? >>>>> If this is not the case, perhaps there is something else wrong. >>>> I’m not an RL02 hardware expert at all, just a daily user back in the >>>> day. I’m reading this assuming that at all times the drive is >>>> correctly hooked up to an RLV12 in a running PDP with the correct >>>> cable and termination present on the drive? If it isn’t you’ll get a >>>> fault condition instead of ready after spin up. >>>> >>>> A >>> No worries, your input has been valuable, so thank you. >>> >>> For anyone else who might have an idea: >> ON fault the heads are retracted and will not load till cleared. >> Least mine behaves that way. >> >> Most common problems are wrong drive address, cable issues, no terminator. >> Others include head lock not removed or the auto unlock style of >> headlock has >> the tab broken. >> >>> It seems to be hooked up correctly. When it is in the weird flashing >>> ready state, the boot loader says "Read error" or "Device error" >>> randomly. The heads oscillate back and forth very slightly as if it is >>> trying to align itself better on the first track, which doesn't exist >>> because it hasn't moved far enough into the pack. >> IF in fault its resetting to retracted on every try. >> If not something else is wrong. >> >>> I'm beginning to think the heads are bad which will be far too expensive >>> so I may end up giving up. >> Heads are not that expensive... However you could have a wrong pack >> or one that has been erased and has no servo tracks. You must start with >> a known good pack and cleaned heads. >> >> >> Allison > Well, I replaced the DOWN head and adjusted the amplitude on the r/w > board. The drive now stays in READY without the FAULT lamp coming on, so > this is promising. The heads load onto the first track. > > Without any r/w operations, should the READY light flash? Mine is > flashing a little but not too rapidly. I am guessing this is while it > tries to keep the heads positioned over the track. Yes, normal read/write/seek activity causes that.
> When I try to boot using the MXV11-BF boot roms, it says: > MXV-11 boot is not very chatty or informative. > ]] ?BOOTROM-F- DL 0 read error > > The alignment between the two heads looks okay also. > > Any ideas, anyone? Is the OS on it? IF RT-11 is it configured to boot from DL-nn? IF you have OS on floppy can your do a dir of the devices it knows of? Allison > Thanks, > Aaron. >
