单选题The system administrator notices that there is an I/O bottleneck on one of three disks in datavg volume group. This problem disk contains the JFS log， loglv00 and one filesystem， /mydatabase.  There are no other logical volumes on this disk.  Which of 

第1题：

A system administrator has a server experiencing performance problems with logical volumes within a particular volume group. Which command can report I/O statistics for logical partitions with each logical volume within the volume group？（）

• A、lslv
• B、lsvg
• C、iostat
• D、lvmstat

第2题：

An  administrator  has  a  server  experiencing  performance  problems  with  logical  volumes  within  a particular volume group.  Which command can report I/O statistics for logical partitions with each logicalvolume within the volume group（）

• A、Islv
• B、vmstat
• C、iostat
• D、Ivmstat

第3题：

The system administrator notices that there is an I/O bottleneck on one of three disks in datavg volume group. This problem disk contains the JFS log， loglv00 and one filesystem， /mydatabase.  There are no other logical volumes on this disk.  Which of the following options would be the best solution？（）

• A、 Increase the size of the JFS log logical volume so more transacations can be written to this log.
• B、 Create a second， additional JFS log and have the /mydatabase logical volume point to both JFS logs.
• C、 Migrate the JFS log device to another physical disk in the same volume group.
• D、 Only one JFS log device for each volume group can be used.  Use the migratepv command to move the JFS log device to an empty disk in another volume group.

第4题：

A system administrator has backed up the datavg volume group using the savevg command. There are several raw logical volumes and some unmounted jfs filesystems in datavg. Which of the following statements is true about this backup?（）

• A、The volume group and all logical volumes will be recreated. All raw and jfs filesystms will be backed up and restored.
• B、This backup will be bootable and the volume group and all jfs logical volumes will be recreated.
• C、This backup will not be bootable and the restorevg command is used to restore only the mounted and non-raw logical volumes. It will not recreate any logical volumes that are raw or unmounted.
• D、The volume group and all logical volumes information is archived and will be recreated. The raw and unmounted filesystems will not be backed up and therefore not restored.

第5题：

A previously functional, scheduled snapshot operation against a JFS2 filesystem has failed. The JFS2 filesystem is mounted and appears intact. What is the most likely cause of the failure and how should it be resolved?（）

• A、The associated JFS2 log device has failed. Check the log device and varyon the device.
• B、The logical volume that hosts the snapshots is full. Increase the size of the logical volume.
• C、Fifteen snapshots already exist for the given JFS2 filesystem. Delete at least one existing snapshot.
• D、The volume group that hosts both the snapshots and JFS2 filesystem has lost quorum. Check and correct the integrity of the volume group.

第6题：

A log logical volume is created as indicated below: root@host1:/# mklv -a c -t jfs2log -b y datavg 1 loglv00 root@host1:/# lsvg -l datavg datavg: LV NAMETYPELPsPPsPVsLV STATE MOUNT POINT loglv00jfs2log111closed/syncdN/AA new filesytem is then created using the new log logical volume.When the administrator attempts to mount the filesytem, the following error occurs:root@host1:/# mount/newfs mount: 0506-324 Cannot mount /dev/lv00 on /newfs: Asystem call received a parameter that is not valid. Which of the following actions will resolve this error?（）

• A、Recreate the file system with -p rw flags and re-mount.
• B、Run 'logform /dev/loglv00' and hit 'y' to destroy all data.
• C、Run 'clrginfo -p' to clear the invalid filesystem parameter.
• D、Change 'account = true' value in /etc/filesystem to 'account = false'.

第7题：

A SAN needs to undergo disruptive maintenance, which will effect a hosted production system with multiple applications and related volume groups, one of which, datavg, resides on the SAN. There is one spare disk in the system but it is smaller than datavg. How can application outages and risk of corruption be minimized?（）

• A、Stop the applications in all data volume groups and shut the system down during the outage period.
• B、Stop the applications in datavg, unmount all datavg filesystems, varyoff datavg, and export datavg.
• C、Stop the applications in datavg, unmount all datavg filesystems, and reduce datavg by the SAN disks.
• D、Use the 'cpvg' command with the -z option to copy and compress datavg to different physical volumes.

第8题：

The /systest filesystem is associated with the /dev/testlv logical volume on the ’testvg’ volume group. Given this information， which of the following commands can the system administrator use to determine if the /systest filesystem is mirrored？（）

• A、df
• B、lsvg
• C、lsfs
• D、lsdev

第9题：

A system administrator can create logical volumes and then add file systems to them， or create the file system directly. What is an advantage of the two-step approach instead of the one-step approach？（）

• A、The number of bytes per inode can be specified.
• B、Placement of the filesystem on the disk can be specified.
• C、The jfslog can be specified on creation of the filesystem.
• D、Either a JFS or JFS2 filesystem can be created on the logical volume.

第10题：

Error log analysis indicates that a disk is starting to fail and will need to be replaced. The failing disk contains multiple logical volumes which span multiple disks. A free disk has been added to the failing disk’s volume group.Which of the following is the most efficient method to move the data from the failing disk to the new disk？（）

• A、Back up the data， remove the failing disk from the volume group， then restore the data to the new disk.
• B、Use the migratepv command to move data from one disk to another and then remove the failing disk from the volume group.
• C、Use the mirrorvg command to mirror the data to the new disk， break the mirror and then remove the failing disk from the volume group.
• D、Create a new filesystem on the new disk and use the mv command to move the data to the new filesystem， and then remove the failing disk from the volume group.