Data ONTAP 7
Question(s) and Answer(s)
Data ONTAP and Disk Qualification Package (DQP)
- Data ONTAP does not recognize a drive correctly.
- Data ONTAP recognizes a 15k RPM drive as 10K RPM (default).
- Is the installation of a new Disk Qualification Package (DQP) disruptive to the system?
No. You can install a new DQP at any time without disrupting the system. The file will be processed by ONTAP 5-10 minutes after installation.
- Where does one install the
Data ONTAP looks for the
qual_devices*file in the
/etcdirectory of the root volume.
- Should one copy a specific version of the
qual_devicesfile out of the archive or should one copy the contents of the entire
DQParchive in the
The minimum requirement is to install the version specific to the current Data ONTAP running on the storage system. The
DQPfile should be placed in the
/etcfolder in the root volume (/vol/vol0) on the filer.
However, it is recommended to place all
qual_devices*files (in the Disk Qualification Package) in the
/etcfolder to ensure smooth Data ONTAP upgrades in future.
- How does Data ONTAP determine if the
DQPfile has changed? And, how frequently does it check for changes in the installed
Data ONTAP reads the modification time of the
DQPfile to determine if it has changed or not. If the file modification time is different from the last time it checked, it processes it.
Data ONTAP checks approximately every 5-10 minutes to see if the file modification time has changed.
- Does one have to reinstall
DQPevery time one adds a new drive or shelf?
No, one does not have to install a new
DQPevery time one adds a new drive or shelf.
Nonetheless, it is good practice to install the latest
DQP, disk firmware, shelf firmware before the new hardware is added. The best time to do this is close to (before) adding new hardware.
- Does Data ONTAP load
DQPafter a reboot?
Yes, it loads
DQPas a part of the boot up process if it finds unqualified disks that are unknown to the kernel. This may take place a few minutes after the initial boot up and therefore a little delay is expected.
- Does Data ONTAP understand all versions of
qual_deviceor does it understand only specific version depending upon the Data ONTAP revision?
Yes, specific revisions of Data ONTAP look for a particular revision of the
/etc/qual_devicesfile as shown below. However, you still need to install/copy all
qual_devices*files to the filer, regardless of what version you are on.
qual_devices For releases prior to 7.2.1
qual_devices_v2 For releases 7.2.1, 7.2.2 and 7.2.3
qual_devices_v2.copy Backup copy of v2 file
qual_devices_v3 For releases 7.2.4 and later
qual_devices_v3.copy Backup copy of v3 file
8. How do I force Data ONTAP to re-read the Disk Qualification File?
One can reboot the filer to have Data ONTAP re-read the
|Caution: Do not edit the
qual_devices file is located at