> There are two versions of idezr. One of them kinda-sorta knows? how to tell the PK device on a SCSI bus so it can reset the bus > if a disk stays unresponsive too long. It will try this to get  such a thing going if it has to.    Use zridebldr.com to build this.  @ The other knows nothing about reset, but will still allow access. to disks with non-512 byte blocks or the like.   Use zridebld.com to build this.     ; Note: the zrdriver builds are the same for each, so you can / build both and just pick which you want to use.   ; This system lets you control almost any arbitrary SCSI disk < as a normal VMS disk. It uses io$_diagnose to read disk size; and read and write blocks. If it gets errors long enough it 9 will try to reset the SCSI bus it is on (using the device : name to infer that DKB4: for example would be on bus PKB).> If this fails it may act weird but generally will fail to yank9 reset. Then I/O may eventually just fail. It mimics mount 7 verify this way...many retries with resets if they seem 
 to be needed.    Use:9 Build, copy zrdriver.exe and zridehost.exe into somewhere 8 like a part of sys$system. Copy zridehost.cld there too.  7 $ sysman io conn zra0:/noada/driver=sys$system:zrdriver 7 $ sysman io conn zra1:/noada/driver=sys$system:zrdriver 9  ... and so on for all ZR units you want. These are what   	you mount.   ; Run a batch job or whatnot so that it includes the elements   " $ set command sys$system:zridehost $ zridehost zra0: dkb5: 7 	for setup of zra0: on physical device dkb5:. Note that 9 	it is perfectly ok to use gkb5: or whatnot instead; both + 	dkdriver and gkdriver accept io$_diagnose.    	Note too you may need8 	$ sysman io set exclude=(dkb0,dkb1,dkb2,dkb3,dkb4,dkb5)4 	or something like it to avoid having those devices 5 	autoconfigured if you don't want dkdriver configured , 	for them. If you do that THEN you need e.g.0 $ sysman io conn gkb0:/noada/driver=sys$gkdriver 	to define gkb0: if you want that.   > The dtdoany.com file is designed to run batch files as needed, use:$ $ submit/param=(zra0:,dkb5:) dtdoany   to get the effect of the above.  (I use submit/noprint) Glenn Everhart     ps - Be sure and put  $dism zra0:   	 and so on ? commands in syshutdwn.com in sys$manager. This will make the zr ? disks dismount and will cause the zridehost image to exit, thus 5 freeing the "host" disks (e.g. dkb5: in the example). 