[dba-Tech] Operating System not found

ok, now dont tell me computers have no soul or life of their own or an own 
will ;)

exchanged the power cables back, and it is working fine still.
so explain this:
- the PC works ok yesterday till afternoon
- then all of a sudden, it wont start (Operating system not found), checked 
it with 3 different HDs that all work.
on all of these Acronis can see the disk and the directories on it.
this morning again the same.
- disconnect 1 pair of HDs and it works
- exchange power connections and reconnect the HDs - still works
- reexchange power connections, so its the same wiring and everything as 
yesterday afternoon and this morning,
and the system still works fine. nothing is different from yesterday when it 
didnt work.

and now, how do I find the problem????

Lembit

----- Original Message ----- 
From: "Lembit Soobik" <lembit.dbamail at t-online.de>
To: "Discussion of Hardware and Software issues" 
<dba-tech at databaseadvisors.com>
Sent: Monday, October 15, 2007 1:43 PM
Subject: Re: [dba-Tech] Operating System not found


> got it back up, but I question whether this is the solution or just
> temporarily working:
>
> this PC has:
> 1 - one system drive = C: (IDE) - now replaced with a 300GB seagate
> 2 - two SCSI drives in a dynamic stripset =R:
> 3 - two SATA drives on an expansion board S:
> 4 - DVD burner
> 5 - Grapic card Saphire Radeon X1950 Pro
> - Power supply Hiper HPU-4M670-SU (670 W, 720 W peak) - 5 separate outputs
> for drives (1-5 above)
>
> What I did so far:
> disconnect power for the SCSI drives
> result: works ok
>
> now I exchanged the power connections of R: and S:
> works ok and I am presently running Check on R:
>
> The 5 +12V-outputs are speced 16A each, 5V is 30A
> all 5 together max 465 W
> assuming 2A per HD, this is roughly half the max allowance.
>
> so, I'm a bit puzzled now, what else could be wrong??????????
>
> Lembit
>
>
> ----- Original Message ----- 
> From: "Lembit Soobik" <lembit.dbamail at t-online.de>
> To: "Discussion of Hardware and Software issues"
> <dba-tech at databaseadvisors.com>
> Sent: Sunday, October 14, 2007 8:15 PM
> Subject: [dba-Tech] Operating System not found
>
>
>>I am replacing the system disk in one PC with a larger one.
>> I have the original disc intact
>> and I have installed the system on two other disks now and had it 
>> running.
>> (made an image of the original disk and restored it to the new disks by
>> running them as slave).
>> Now all of the sudden I get
>>
>> Operating System not found
>>
>> when I try to start it with either one of these disks.
>> when I try to run the PC, I have now only one disk as master connected,
>> and
>> yes the power cable is alse connected and the disk is spinning.
>>
>> Now I started the PC from an Arconis disk, and there I can see the System
>> disk with all the data on it, so it cannot be the cable.
>> What else can suddenly fail such that I get this error?
>>
>> Thanks
>> Lembit
>>
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>>
>>
>> -- 
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.5.488 / Virus Database: 269.14.9/1069 - Release Date:
>> 13.10.2007 19:26
>>
>>
>
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