| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 3227.1 | Not parking drives can damage them. | CSC32::K_APPLEMAN | | Mon Dec 18 1989 13:41 | 19 |
| re: 3227.0
Parking the heads moves the heads off of the data area of the disk and
onto a special "Landing area" this is lubricated. When a winchester
disk spins down, the heads actually contact the surface. Having this
happen on your data area could damage the data and the heads. Doing
this a couple of times probably will not hurt anything, but neglecting
to park the heads habitually will definitely cause damage.
Some drives are made so that they automatically park the heads when
powered off so no Park program is necessary.
The thing I don't understand is why does the documentation tell you
that if you have a partitioned drive, you must park both partitions?
There is only 1 landing zone and it should only be necessary to park it
once. Any ideas on this out there?
Ken
|
| 3227.2 | | WJG::GUINEAU | Quantum Reality | Mon Dec 18 1989 14:19 | 12 |
| > that if you have a partitioned drive, you must park both partitions?
> There is only 1 landing zone and it should only be necessary to park it
> once. Any ideas on this out there?
That's rediculous! "Parking", like you described, moves the heads to the
landing zone. There is only one set of heads in a typical hard disk. Partitions
are logical subdivisions of the disk space provided by the system software
(drivers, device handler).
John
|
| 3227.3 | Land in the parking zone ?? | CSOA1::CURTIS | | Mon Dec 18 1989 14:56 | 9 |
| Has anyone seen this ? I have a new A590 and it seems if I click
on the PARK Icon, then power off and turn it on, say, the next day,
it does not want to boot from power up. But if I do a reset, it
then boots. However, if I do not park the heads, then power off
and turn it on later, it boots ok. Anyone else ? Also, I don't know
for sure, but it seems to me Commodore would take into consideration
about people turning off the A590 without parking the heads and
would build in a retract command when it senses power off. Maybe
I'll call Commodore and find out..............
|
| 3227.4 | Not always convenient | BELFST::MCCLINTOCK | Peter | Mon Dec 18 1989 15:06 | 10 |
| This all seems pretty primitive stuff .. not automatically parking the
heads on power-off. What can you do when you boot a protected game
from df0: (such as the UK version of Falcon) and have no access to
Amigados (or the A590). Do you have to reset the system and park
the heads before powering off??
re .3
I haven�t experienced the problem.
Peter
|
| 3227.5 | | WJG::GUINEAU | Quantum Reality | Mon Dec 18 1989 20:28 | 14 |
|
> This all seems pretty primitive stuff .. not automatically parking the
> heads on power-off. What can you do when you boot a protected game
I agree 100%. IMHO this is a BS way for Commodore to buy CHEAP drives.
No self respecting modern day disk drive requires you to park the heads.
After dealing with a Rodime drive in my A2500 I'm convinced Commodore
has little concern for such a critical piece of hardware.
What kind of drive is in the A590? Anyone open one? If you tell mem what it
is, I'll try to find out if they autopark themselves.
John
|
| 3227.6 | Western Digital something | CSC32::K_APPLEMAN | | Tue Dec 19 1989 11:47 | 13 |
| The drive is a Western Digital XT type. I will check on the specific
type tonight when I get home.
I have noticed the same boot problem with my A590,i.e. it won't boot on
power up except by resetting the computer.
On parking both partitions, I suspect that the park program does more
than just move the heads to the landing zone. It may check for open
files or something first. At any rate, it is only necessary to click
the PARK icon once to park both partitions, so it really isn't a
hassle, just a curiosity.
Ken
|
| 3227.7 | | MQOFS::DESROSIERS | Lets procrastinate....tomorrow | Tue Dec 19 1989 22:44 | 4 |
| I have heard that you must park the heads when you MOVE the drive, not
when you just power off untill the next use, is this right?
Jean
|
| 3227.8 | only if you value your data | LEVERS::MEYER | Dave Meyer | Wed Dec 20 1989 02:30 | 6 |
| Not having the heads parked when you move any hard drive is an
invitation to disaster. Not having the heads parked when the disk
spins down is merely tempting fate. Most new drives will park
themselves at spin-down, even at a brief power hit. Of course, if
your backups are always current and your bank balance always flush
then you needn't give it a second thought. Right?
|
| 3227.9 | Western Digital 93028 | CSC32::K_APPLEMAN | | Wed Dec 20 1989 11:32 | 7 |
| The drive on my A590 is a Western Digital 93028. Maybe I will try to
contact WD and find out if this particular drive needs to be parked. I
understand that Commodore uses at least 2 different types of drives in
the A590
Ken
|
| 3227.10 | Landing zone hype. | MQOFS::LEDOUX | Reserved for Future Use | Thu Jan 18 1990 09:51 | 17 |
| I remember reading an article that mentionned the parking of the
heads. It was saying that now a day the winchester heads are
made to land ANYWHERE on the surface without damaging it.
The winchester head design permits just that.
The parking zone should be used only for moving the drive.
Now they were probably talking about recent technology drives,
not the first generation winchesters.
I have 2 HD on my 2000 and I don't even have a "park" program.
When I power on, the "self test" bring the head to cyl 0 with
a humming noise, and the duration of the hum is never the same.
If I power off over a newly created file, (toward the spindle)
on power on, the hum last longest. This tells me that the heads
land wherever they are. I don't see any problem with that.
|