| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 4936.1 | enable sync give better speed | ARRODS::GOLDSTEIN | Steve G DTN: 847-5416/5455 | Wed Jul 31 1991 05:00 | 5 |
|
A friend has the sync mode enabled on his A3000 and it speeds up
the system quite a bit.
|
| 4936.2 | | STAR::GUINEAU | but what was the question? | Wed Jul 31 1991 09:16 | 13 |
| Synchronous is germane to SCSI.
It's one of two possible data transfer methods, the other being asynchronous
(although if you knew the underlying technical details, you'ld
think the
named were reversed!)
In any case, asynchronous transfer is limited to typically about 1.5MB/s,
except on some newer devices and newer interface chips, which may get
upwards of 4MB/s (but then most new devices utilize synchronous)
Synchronous data transfer is limited to about 5MB/s
john
|
| 4936.3 | | STAR::GUINEAU | but what was the question? | Wed Jul 31 1991 09:17 | 4 |
| By the way, with SCSI-2 and new chips (just starting to become available),
data transfer can be upwards of 40MB/s!
john
|
| 4936.4 | | PAMSRC::63643::BARRETT | Keith meister, making notes | Wed Jul 31 1991 09:31 | 2 |
| I have 2 QUANTUM drives on my 3000 (the 100 and 200 meg ones). Is
there any "risk" in enabling the synchronous setting?
|
| 4936.5 | | STAR::GUINEAU | but what was the question? | Wed Jul 31 1991 09:58 | 14 |
| I wouldn't say there is a risk, although I know there were some bugs in the
A3000 SCSI (and the A2091) that new ROMS were issued for. Check with your
service center for the latest.
Try this:
backup your data (this should be tried often :-) )
run diskspeed
enable synchronous
run diskspeed
You should be happy with the results...
john
|
| 4936.6 | Seems to work | PAMSRC::63653::BARRETT | Keith meister, making notes | Wed Jul 31 1991 11:14 | 8 |
|
It seems to work well. Visually, it's much faster (icons appear quicker, etc).
Diskspeed reports that it is faster, but the numbers don't suggest anything
incredible.
Thanks! I'll think I'll keep using it this way unless I discover a problem.
Keith
|
| 4936.7 | How ?/ | GIDDAY::MORAN | | Thu Aug 01 1991 23:30 | 5 |
|
How do you enable the synchronus setting ???
Shaun.
|