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Reading raw disk on Solaris

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Operating Systems Solaris Reading raw disk on Solaris
# 8  
Old 07-31-2007
Are you are certain that you are looking at the right disk and not the cd/dvd drive ?
# 9  
Old 07-31-2007
Yup:
Code:
rhino# iostat -En
c0t1d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0 
Model: ST3160022ACE     Revision: 9.51     Serial No: 5JS7STTP         
Size: 137.44GB <137438952960 bytes>
Media Error: 0 Device Not Ready: 0  No Device: 0 Recoverable: 0 
Illegal Request: 0 
c0t0d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0 
Model: ST3120026A       Revision: 8.01     Serial No: 4JT0VLFZ         
Size: 120.03GB <120034123776 bytes>
Media Error: 0 Device Not Ready: 0  No Device: 0 Recoverable: 0 
Illegal Request: 0 
c0t2d0           Soft Errors: 1 Hard Errors: 0 Transport Errors: 0 
Vendor: TSSTcorp Product: CDW/DVD TS-H492C Revision: SI00 Serial No:  
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0 
Illegal Request: 1 Predictive Failure Analysis: 0

I will try another 'raw' disk in case there is a problem with this one...
# 10  
Old 07-31-2007
Quote:
Originally Posted by son_t
I haven't tried it, but the point is that it is a raw disk - i.e. FS unknown... so things such as 'blocksize' does not exist or unknown...
I am not referring to cluster sizes, I am refering to how SCSI controllers read disks, they read multiples of sectors.

And as you say, you haven't tried it.
# 11  
Old 08-01-2007
Hi porter, I appreciate your responses... but I feel you are barking up the wrong tree here.

I have now put in a smaller HDD (came out of a Sun box originally) and here are the results:

Code:
rhino# iostat -En
c0t1d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0 
Model: ST340016A        Revision: 3.10     Serial No: 3HS1Z16S         
Size: 40.02GB <40020664320 bytes>
Media Error: 0 Device Not Ready: 0  No Device: 0 Recoverable: 0 
Illegal Request: 0 
c0t0d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0 
Model: ST3120026A       Revision: 8.01     Serial No: 4JT0VLFZ         
Size: 120.03GB <120034123776 bytes>
Media Error: 0 Device Not Ready: 0  No Device: 0 Recoverable: 0 
Illegal Request: 0 
c0t2d0           Soft Errors: 1 Hard Errors: 0 Transport Errors: 0 
Vendor: TSSTcorp Product: CDW/DVD TS-H492C Revision: SI00 Serial No:  
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0 
Illegal Request: 1 Predictive Failure Analysis: 0 
rhino# format
Searching for disks...done
 
 
AVAILABLE DISK SELECTIONS:
       0. c0t0d0 <ST3120026A cyl 57459 alt 2 hd 16 sec 255>
          /pci@1e,600000/ide@d/dad@0,0
       1. c0t1d0 <DEFAULT cyl 19156 alt 2 hd 16 sec 255>
          /pci@1e,600000/ide@d/dad@1,0
Specify disk (enter its number): ^D

rhino# dd if=/dev/dsk/c0t1d0s0 bs=512 skip=0 count=1024
dd: /dev/dsk/c0t1d0s0: open: I/O error
rhino# dd if=/dev/dsk/c0t1d0s2 bs=512 skip=0 count=1024
dd: /dev/dsk/c0t1d0s2: open: I/O error
rhino# dd if=/dev/rdsk/c0t1d0s0 bs=512 skip=0 count=1024
dd: /dev/rdsk/c0t1d0s0: open: I/O error
rhino# dd if=/dev/rdsk/c0t1d0s2 bs=512 skip=0 count=1024
dd: /dev/rdsk/c0t1d0s2: open: I/O error
rhino#

Still the same problems. Any more ideas?
# 12  
Old 08-01-2007
Maybe you could tell dd where you want to send the output ?
# 13  
Old 08-01-2007
Got it to work now... It looks like I have to LABEL the disk!

When you put a disk in a Solaris box that is not a Solaris disk - it reports the disk as having a corrupt label...

If use format and then label the disk it then seems to then allow access using dd... (if I then use dd to zero the disk, the label info is lost.)

Can anyone tell me what/where the Solaris disk label is? How big is it, what info, etc?

Obviously I don't want to write info onto the disk if that info is going to corrupt whatever system the 'raw' disk came out of! I just want to put it into a Solaris system to enable it to be analysed (by extracting the data off).

I will try coding some C to access the disk and see if this is any more succesful or whether it has to be labelled...
# 14  
Old 08-01-2007
You may be able to access the disk from the /devices path to the device. It is not by any means certain, but it might work.
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