Hitachi TAGMASTORE MK-90RD011-25, User Manual

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Hitachi Command Control Interface (CCI) User and Reference Guide 341
5.1.1 About Linux Kernel 2.6.9.XX supported ioctl(SG_IO)
The RAID Manager currently uses the ioctl(SCSI_IOCTL_SEND_COMMAND) for sending the
control command to the command device. However, in RHEL 4.0 using kernel 2.6.9.XX, the
following messages are output to syslog file (/var/log/messages) with every ioctl().
program horcmgr is using a deprecated SCSI ioctl, please convert it to SG_IO
This seems to originate from the following kernel code in drivers/scsi/scsi_ioctl.c as way of
warning that ioctl(SCSI_IOCTL_…) of kernel 2.6.9.XX does not handle rightly an error of the
HBA driver.
-------------------------------------------------------------------------------------------
/* Check for deprecated ioctls ... all the ioctls which don't follow the new unique
numbering scheme are deprecated */
switch (cmd) {
case SCSI_IOCTL_SEND_COMMAND:
case SCSI_IOCTL_TEST_UNIT_READY:
case SCSI_IOCTL_BENCHMARK_COMMAND:
case SCSI_IOCTL_SYNC:
case SCSI_IOCTL_START_UNIT:
case SCSI_IOCTL_STOP_UNIT:
printk(KERN_WARNING "program %s is using a deprecated SCSI "
"ioctl, please convert it to SG_IO\n", current->comm);
-------------------------------------------------------------------------------------------
Thus, RAID Manager supports a way to change to the ioctl(SG_IO) automatically, if Linux
kernel supports the ioctl(SG_IO) for horcmgr and inqraid command. However, in the
customer site, RAID Manager may encounter to Lilux kernel which does not support the
ioctl(SG_IO) fully. After this consideration, RAID Manager also supports by defining either
following environment variable or “/HORCM/etc/USE_OLD_IOCTL” file (size=0) that uses the
ioctl(SCSI_IOCTL_SEND_COMMAND) forcibly.
For Example:
export USE_OLD_IOCTL=1
horcmstart.sh 10
HORCM/etc:
-rw-r--r-- 1 root root 0 Nov 11 11:12 USE_OLD_IOCTL
-r--r--r-- 1 root sys 32651 Nov 10 20:02 horcm.conf
-r-xr--r-- 1 root sys 282713 Nov 10 20:02 horcmgr