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Errno = 2: No such file or directory

VladimirTarasov
Level 2

Hello!

Could you help to understand cause of stream interruption of raw data.

Nov 16, 2018 4:58:03 PM - Warning bpbrm (pid=8920) from client ombs: WRN - /devices/scsi_vhci/disk@g600601608d803400cf626a191adae811:a,raw is a character special file. Backing up the raw partition.
Nov 16, 2018 4:58:03 PM - positioned 3095L4; position time: 0:00:02
Nov 16, 2018 4:58:03 PM - begin writing
Nov 16, 2018 9:02:33 PM - Error bpbrm (pid=8920) from client ombs: ERR - Read error at block 2082389500 reading 262144 bytes in file /devices/scsi_vhci/disk@g600601608d803400cf626a191adae811:a,raw. Errno = 2: No such file or directory
Nov 16, 2018 9:02:33 PM - Info bpbkar (pid=8927) bpbkar waited 13762 times for empty buffer, delayed 383374 times
Nov 16, 2018 9:02:33 PM - Info bptm (pid=9035) waited for full buffer 498949 times, delayed 676314 times
Nov 16, 2018 9:02:47 PM - Error bptm (pid=9035) media manager terminated by parent process
Nov 16, 2018 9:02:50 PM - Info bpbkar (pid=8927) done. status: 6: the backup failed to back up the requested files
Nov 16, 2018 9:02:50 PM - end writing; write time: 4:04:47
the backup failed to back up the requested files  (6)


...
Nov 16, 2018 7:48:43 PM - Warning bpbrm (pid=19962) from client ombs: WRN - /devices/scsi_vhci/disk@g600601602dd03400e541481c1adae811:a,raw is a character special file. Backing up the raw partition.
Nov 16, 2018 7:48:43 PM - positioned 3096L4; position time: 0:00:02
Nov 16, 2018 7:48:43 PM - begin writing
Nov 16, 2018 9:02:33 PM - Error bpbrm (pid=19962) from client ombs: ERR - Read error at block 500697596 reading 262144 bytes in file /devices/scsi_vhci/disk@g600601602dd03400e541481c1adae811:a,raw. Errno = 2: No such file or directory
Nov 16, 2018 9:02:33 PM - Info bpbkar (pid=19970) bpbkar waited 359 times for empty buffer, delayed 149911 times
Nov 16, 2018 9:02:33 PM - Info bptm (pid=20078) waited for full buffer 153027 times, delayed 213445 times
Nov 16, 2018 9:02:47 PM - Error bptm (pid=20078) media manager terminated by parent process
Nov 16, 2018 9:02:50 PM - Info bpbkar (pid=19970) done. status: 6: the backup failed to back up the requested files
Nov 16, 2018 9:02:50 PM - end writing; write time: 1:14:07
the backup failed to back up the requested files  (6)

 

4 REPLIES 4

Nicolai
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Is this a backup with policy type = Flashbackup ?

Today it is very rare to backup disks at the block level because we have the Netbackup Accelerator functionality.

"Errno = 2: No such file or directory" is a operating system message, look in messages or syslog for related messages. 

Marianne
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@VladimirTarasov
I am firstly curious about your reason for doing raw partition backup ?

Secondly, have you read this section in NBU Admin Guide I ? 
Consider the following items when creating UNIX raw partition backups.

Can you confirm that the file system is unmounted to prevent file changes during backup? 

The fact that some data was actually backed up / read when the error is seen, may indicate that there was an issue between hardware and OS. 
A loss of disk visibility at OS level should be logged in /var/adm/messages on client ombs at more or less the time that the error was seen in NBU. 

Hello,

Issue was on client side (error was seen on VNX).

Marianne
Moderator
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Partner    VIP    Accredited Certified

So, client lost connectivity to VNX storage as I suspected?

....still curious about the reason for doing raw partition backups.... 
Hopefully you are performing regular restore tests?