11-15-2008
Regularly on SANs theres microcode upgrade with disruption of one fiber...
To not suffer disruption you usually use 2 HBA through 2 separate paths...
Your internal drives are HW raid/mirror with spare or software?
If software when disks go wrong usually it sends reset SCSI signals which affect the others diversely...
For safety I would go with 2 new HBAs...
All the best
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LEARN ABOUT SUSE
tran_reset
tran_reset(9E) Driver Entry Points tran_reset(9E)
NAME
tran_reset - reset a SCSI bus or target
SYNOPSIS
#include <sys/scsi/scsi.h>
int prefixtran_reset(struct scsi_address *ap, int level);
INTERFACE LEVEL
Solaris architecture specific (Solaris DDI).
PARAMETERS
ap Pointer to the scsi_address(9S) structure.
level The level of reset required.
DESCRIPTION
The tran_reset() vector in the scsi_hba_tran(9S) structure must be initialized during the HBA driver's attach(9E) to point to an HBA entry
point to be called when a target driver calls scsi_reset(9F).
tran_reset() must reset either the SCSI bus, a SCSI target device, or a SCSI logical unit as specified by level.
level must be one of the following:
RESET_ALL Reset the SCSI bus.
RESET_TARGET Reset the target specified by ap.
RESET_LUN Reset the logical unit specified by ap.
tran_reset should set the pkt_reason field of all outstanding packets in the transport layer associated with each target or logical unit
that was successfully reset to CMD_RESET and the pkt_statistics field must be OR'ed with either STAT_BUS_RESET (if the SCSI bus was reset)
or STAT_DEV_RESET (if the target or logical unit was reset).
The HBA driver should use a SCSI Bus Device Reset Message to reset a target device. The HBA driver should use a SCSI Logical Unit Reset
Message to reset a logical unit.
Packets that are in the transport layer but not yet active on the bus should be returned with pkt_reason set to CMD_RESET and pkt_statis-
tics OR'ed with STAT_ABORTED.
Support for RESET_LUN is optional but strongly encouraged for new and updated HBA drivers. If an HBA driver provides RESET_LUN support, it
must also create the lun-reset capability with a value of zero for each target device instance represented by a valid ap. The HBA is also
required to provide the means to return the current value of the lun-reset capability in its tran_getcap(9E) routine, as well as the means
to change the value of the lun_reset capability in its tran_setcap(9E) routine.
RETURN VALUES
tran_reset() should return:
1 on success.
0 on failure.
SEE ALSO
attach(9E), ddi_dma_buf_setup(9F), scsi_hba_attach(9F), scsi_reset(9F), scsi_address(9S), scsi_hba_tran(9S)
Writing Device Drivers
NOTES
If pkt_reason already indicates that an earlier error had occurred for a particular pkt, tran_reset() should not overwrite pkt_reason with
CMD_RESET.
SunOS 5.10 12 Jul 2002 tran_reset(9E)