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HP-UX check SCSI reservation


 
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Operating Systems HP-UX HP-UX check SCSI reservation
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Old 08-16-2013
HP-UX check SCSI reservation

Hi guys,

I need some help to better understand how to determine if a disk have persistent SCSI reservation. I know that we should use the "Persisten Reservation Utility" but we are not allowed to run that tool. Since we have the output from some grab utility and specifically we have the "scsimgr get _attr" I want to know how can i determine if there is any reservation on the disks.


Thanks for your help!

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scsi_status(9S) 					    Data Structures for Drivers 					   scsi_status(9S)

NAME
scsi_status - SCSI status structure SYNOPSIS
#include <sys/scsi/scsi.h> INTERFACE LEVEL
Solaris DDI specific (Solaris DDI) DESCRIPTION
The SCSI-2standard defines a status byte that is normally sent by the target to the initiator during the status phase at the completion of each command. STRUCTURE MEMBERS
uchar sts_scsi2 :1; /* SCSI-2 modifier bit */ uchar sts_is :1; /* intermediate status sent */ uchar sts_busy :1; /* device busy or reserved */ uchar sts_cm :1; /* condition met */ ucha sts_chk :1; /* check condition */ sts_chk indicates that a contingent allegiance condition has occurred. sts_cm is returned whenever the requested operation is satisfied sts_busy indicates that the target is busy. This status is returned whenever a target is unable to accept a command from an otherwise acceptable initiator (that is, no reservation conflicts). The recommended initiator recovery action is to issue the command again later. sts_is is returned for every successfully completed command in a series of linked commands (except the last command), unless the command is terminated with a check condition status, reservation conflict, or command terminated status. Note that host bus adapter drivers may not support linked commands (see scsi_ifsetcap(9F)). If sts_is and sts_busy are both set, then a reservation conflict has occurred. sts_scsi2 is the SCSI-2 modifier bit. If sts_scsi2 and sts_chk are both set, this indicates a command terminated status. If sts_scsi2 and sts_busy are both set, this indicates that the command queue in the target is full. For accessing the status as a byte, the following values are appropriate: STATUS_GOOD This status indicates that the target has successfully completed the command. STATUS_CHECK This status indicates that a contingent allegiance condition has occurred. STATUS_MET This status is returned when the requested operations are satisfied. STATUS_BUSY This status indicates that the target is busy. STATUS_INTERMEDIATE This status is returned for every successfully completed command in a series of linked commands. STATUS_SCSI2 This is the SCSI-2 modifier bit. STATUS_INTERMEDIATE_MET This status is a combination of STATUS_MET and STATUS_INTERMEDIATE. STATUS_RESERVATION_CONFLICT This status is a combination of STATUS_INTERMEDIATE and STATUS_BUSY, and it is returned whenever an initia- tor attempts to access a logical unit or an extent within a logical unit is reserved. STATUS_TERMINATED This status is a combination of STATUS_SCSI2 and STATUS_CHECK, and it is returned whenever the target ter- minates the current I/O process after receiving a terminate I/O process message. STATUS_QFULL This status is a combination of STATUS_SCSI2 and STATUS_BUSY, and it is returned when the command queue in the target is full. SEE ALSO
scsi_ifgetcap(9F), scsi_init_pkt(9F), scsi_extended_sense(9S), scsi_pkt(9S) Writing Device Drivers SunOS 5.10 30 Aug 1995 scsi_status(9S)

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