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Impossible to access on /vol1

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Operating Systems Solaris Impossible to access on /vol1
# 8  
Old 12-27-2013
Quote:
Originally Posted by rbatte1
You have a simple disk, c0t1d0
I doubt there really is a single disk as it is reported as "STK RAID INT", which means there is likely hardware raid behind it.

Unfortunately, making no backup and using UFS instead of ZFS is not the best way to prevent such issues to happen ...
# 9  
Old 12-27-2013
In format, select the c0t1d0, and inquiry, to ensure it's a simple disk.
Then analyze it - non-destructive read test.
It will 'repair' bad sectors i.e. tell the controller to replace by spare sectors. The contents of the 'repaired' sectors is unknown; run an fsck (like Robin suggested) to ensure file system integrity at least.
# 10  
Old 12-30-2013
goodmorning team,
I'm seeing physically 8 disks of 300Gb in the server. Bellow is the result of fsck command:
Code:
# fsck /dev/dsk/c0t1d0s0
** /dev/rdsk/c0t1d0s0
** Last Mounted on /vol1
** Phase 1 - Check Blocks and Sizes
** Phase 2 - Check Pathnames
WARNING: /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0 (sd2):
        Error for Command: read                    Error Level: Retryable
        Requested Block: 167762                    Error Block: 167762
        Vendor: Sun                                Serial Number:             
        Sense Key: Hardware Error
        ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0
WARNING: /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0 (sd2):
        Error for Command: read                    Error Level: Retryable
        Requested Block: 167762                    Error Block: 167762
        Vendor: Sun                                Serial Number:             
        Sense Key: Hardware Error
        ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0
WARNING: /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0 (sd2):
        Error for Command: read                    Error Level: Retryable
        Requested Block: 167762                    Error Block: 167762
        Vendor: Sun                                Serial Number:             
        Sense Key: Hardware Error
        ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0
WARNING: /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0 (sd2):
        Error for Command: read                    Error Level: Retryable
        Requested Block: 167762                    Error Block: 167762
        Vendor: Sun                                Serial Number:             
        Sense Key: Hardware Error
        ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0
WARNING: /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0 (sd2):
        Error for Command: read                    Error Level: Retryable
        Requested Block: 167762                    Error Block: 167762
        Vendor: Sun                                Serial Number:             
        Sense Key: Hardware Error
        ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0
WARNING: /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0 (sd2):
        Error for Command: read                    Error Level: Fatal
        Requested Block: 167762                    Error Block: 167762
        Vendor: Sun                                Serial Number:             
        Sense Key: Hardware Error
        ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0

CANNOT READ: DISK BLOCK 135632: I/O error
CONTINUE? 
#

but when I type this command, nothing happens:
raidctl -S
# 11  
Old 12-31-2013
To jlliagre,
My assumption is that this is a simple device with the following output that was provided.
Code:
AVAILABLE DISK SELECTIONS:
       0. c0t0d0 <Sun    -STK RAID INT   -V1.0 cyl 36348 alt 2 hd 255 sec 63>
          /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@0,0
       1. c0t1d0 <DEFAULT cyl 54627 alt 2 hd 255 sec 126>
          /pci@0,0/pci8086,340a@3/pci108e,286@0/disk@1,0

The STK RAID device is c0t0d0 with the problem on c0t1d0.

This appears to either be a disk with some bad blocks or a corrupt filesystem. The whole disk is not broken (yet)



To cerco,
You say you have 8 physical disks. That's good to know, but how are they arranged? Are perhaps 7 in a RAID and one is not? From the cylinder numbers, it would almost suggest that you have 5 in a RAID at target zero and 3 as a simple LUN (no protection) at target one, but I can't be sure on the numbers.

I'm guessing that there must be a management tool for the array somewhere, hopefully not part of the server OS, else how would one boot first time to allocate the array? What does that tell you about the arrangement of the disks/LUNs?

What output do you get from the suggestion to analyse the LUN from MadeInGermany? It will take a while to run. It might just be that we have to use fsck and read an alternate superblock, but let's not go that way just yet. It's probably best to find out what we can first before taking action.

Thanks,
Robin
# 12  
Old 12-31-2013
Quote:
Originally Posted by MadeInGermany
In format, select the c0t1d0, and inquiry, to ensure it's a simple disk.
Then analyze it - non-destructive read test.
It will 'repair' bad sectors i.e. tell the controller to replace by spare sectors. The contents of the 'repaired' sectors is unknown; run an fsck (like Robin suggested) to ensure file system integrity at least.
hi MadeInGermany,
sorry, but I don't understand very well what are you asking me to do. could you please just tell me what commands must I type to obtain what you need ?
Solaris is not my strong point Smilie

thanks
# 13  
Old 12-31-2013
I think you need to start the format utility, without the echo | on the front. Just run format on the command line.

It will take you into an interactive disk management session. Select option 1 which should be for the disk in question, c0t1d0 and it should present you a menu of actions you can take. It's been too many years (when Solaris 2.6 was current) to recall what to pick next (it might even be analyze on that menu) but if it's not obvious, paste the menu into the thread to jog my memory. Make sure you pick the read-only / non-destructive test.




Robin
# 14  
Old 12-31-2013
@ratte1 My mistake, you are correct, that's a single disk.

@cerco, you can run "iostat -En" to get some information about your disk. You can also try running "fsck -y /dev/rdsk/c0t1d0s0" see if it manages to fix your file system.
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