Older versions of MaxBlast had some bugs in the Diagnostic code.
PowerMax 4.09/4.23 are the latest versions from Maxtor, and is the recommended tool for older Maxtor/Quantum HDD Diagnostics. These versions are already included in UBCD.
In fact, the available tools from those ol' days for almost all the different manufacturers were the same: an OEM version of some tool from Ontrack. So using an "original" Quantum's tool shouldn't be the recommended tool, having available the "same" tool but more updated.
Seatools (Seagate owns Quantum HDDs) also covers general checks, besides the more-in-depth diagnostics specifically for Seagate's models.
Of course there are older tools that cover older HDDs that are not included in newer versions, but for those cases UBCD includes both versions (WDC "AC" old models, for example).
Most special settings for special models, that used to have specific tools, are already included in newer tools (from Maxtor and/or Seagate) or there is a more general tool that covers them too.
In most cases, scsi models have separate tools, and in most cases are still available from Seagate's website (for Seagate/Maxtor/Quatum/Conner...).
About the "slow" speed, in
part has relation to the (old) HDD speed and condition.
I think that adding every specific tool for every specific case in the default UBCD might over complicate the use for "general" users. For specific cases, there is always the possibility of customization.
To give a different example (other than Quantum), Dell has several DOS-based tools. Should all be added to UBCD as default?
Anyway, this is only my personal opinion, and the info provided here is still useful and appreciated in any case.
For general info and links that might be useful for Quantum HDDs:
LCT20:
http://www.seagate.com/staticfiles/maxt ... asheet.pdf
http://www.seagate.com/staticfiles/maxt ... manual.pdf
"Jumper Settings for Maxtor and Quantum® ATA hard drives.[178585]"
http://support.seagate.com/rightnow/ima ... umpers.htm
("CLJ"=\ "Cylinder Limitation Jumper").
"How can I determine the model and capacity of my Quantum® hard drive?[175331]"
http://seagate.custkb.com/seagate/crm/s ... en&Hilite=
"Seagate KnowledgeBase for Quantum (Internal, External, or SCSI)
(several pages; clcik "next" to see more FAQs)"
http://seagate.custkb.com/seagate/crm/s ... chKeyWord=
"knowledgebase description of the
3digit error code"
(should be the same as for old Seagate/Maxtor/Quantum... at Seagate's site)
http://web.archive.org/web/200208152120 ... 703-000069
"knowledgebase description of the
6digit error code"
(should be the same as for old Seagate/Maxtor/Quantum... at Seagate's site)
http://web.archive.org/web/200208152120 ... 03-000069n
There are more links available, but those are a good "start"

.