hdparm + HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl


 
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Special Forums Hardware Filesystems, Disks and Memory hdparm + HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl
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Old 03-05-2009
hdparm + HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl

Hi All,
Am finding performance of my SD card using hdparm.

Code:
hdparm -tT /dev/BlockDev0

/dev/BlockDev0:
 Timing cached reads:   1118 MB in  2.00 seconds = 558.61 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
ioctl for device
 Timing buffered disk reads:   14 MB in  3.13 seconds =   4.47 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate
ioctl for device

Am not aware of "HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device". What actually makes it to occur?? What does this problem mean? How to resolve it??

Thanks in advance.
Amio
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dev(7FS)							   File Systems 							  dev(7FS)

NAME
dev - Device name file system DESCRIPTION
The dev filesystem manages the name spaces of devices under the Solaris operating environment. The global zone's instance of the dev filesystem is mounted during boot on /dev. A subdirectory under /dev may have unique operational semantics. Most of the common device names under /dev are created automatically by devfsadm(1M). Others, such as /dev/pts, are dynamic and reflect the operational state of the system. You can manually generate device names for newly attached hardware by invoking devfsadm(1M) or implicitly, by indirectly causing a lookup or readdir operation in the filesystem to occur. For example, you can discover a disk that was attached when the system was powered down (and generate a name for that device) by invoking format(1M)). FILES
/dev Mount point for the /dev filesystem in the global zone. SEE ALSO
devfsadm(1M), format(1M), devfs(7FS) NOTES
The global /dev instance cannot be unmounted. SunOS 5.11 9 June 2006 dev(7FS)