Expert Oracle Exadata - Parent Directory

CHAPTER 9 RECOVERING EXADATACELLBOOT USB Flash DriveYou can think of the internal CELLBOOT USB flash drive as you would any external USB drive you wouldplug into your laptop. The device can be seen using the fdisk command as follows:[enkcel01:root] /root> fdisk -l /dev/sdacDisk /dev/sdac: 4009 MB, 4009754624 bytes124 heads, 62 sectors/track, 1018 cylindersUnits = cylinders of 7688 * 512 = 3936256 bytesDevice Boot Start End Blocks Id System/dev/sdac1 1 1017 3909317 83 LinuxJust for fun, we mounted the internal USB flash drive to take a peek at what Oracle included in thisbackup. The following listing shows the contents of this device:[enkcel01:root] /rootmount /dev/sdac1 /mnt/usb[enkcel01:root] /mnt/usb> ls -ltotal 48200-r-xr-x--- 1 root root 2048 Dec 7 07:58 boot.cat-r-xr-x--- 1 root root 16 Dec 7 07:55 boot.msgdrwxr-xr-x 2 root root 4096 Dec 17 11:44 cellbitsdrwxr-xr-x 2 root root 4096 Dec 17 11:44 grub-rw-r--r-- 1 root root 16 Dec 17 11:44 I_am_CELLBOOT_usb-r-xr-x--- 1 root root 854 Dec 17 11:13 image.id-r-xr-x--- 1 root root 441 Dec 17 11:14 imgboot.lst-rw-rw-r-- 1 root root 6579844 Dec 7 07:50 initrd-2.6.18-194.3.1.0.2.el5.img-rw-r--r-- 1 root root 6888101 Dec 17 11:44 initrd-2.6.18-194.3.1.0.3.el5.img-r-xr-x--- 1 root root 29747008 Dec 17 11:14 initrd.img-r-xr-x--- 1 root root 10648 Dec 7 07:55 ISOlinux.bin-r-xr-x--- 1 root root 97 Dec 7 07:55 ISOlinux.cfg-rw-r--r-- 1 root root 23 Dec 17 11:44 kernel.verdrwxr-xr-x 4 root root 4096 Dec 17 11:43 lastGoodConfigdrwxr-xr-x 2 root root 4096 Dec 17 11:45 logdrwx------ 2 root root 16384 Dec 17 11:42 lost+found-r-xr-x--- 1 root root 94600 Dec 7 07:55 memtest-r-xr-x--- 1 root root 7326 Dec 7 07:55 splash.lss-r-xr-x--- 1 root root 1770 Dec 7 07:55 trans.tbl-r-xr-x--- 1 root root 1955100 Dec 7 07:55 vmlinuz-rw-r--r-- 1 root root 1955100 May 27 2010 vmlinuz-2.6.18-194.3.1.0.2.el5-rw-r----- 1 root root 1955100 Dec 17 11:23 vmlinuz-2.6.18-194.3.1.0.3.el5In this backup we see the Linux boot images and all the files required to boot Linux and restore theoperating system. Notice that you also see a directory called lastGoodConfig. This directory is a backupof the /opt/oracle.cellos/iso directory on our storage cell. There is also a directory called cellbitscontaining the Cell Server software. So not only do we have a complete copy of everything needed torecover our storage cell to a bootable state on the internal USB drive, but we also have an online backupof all of our important cell configuration files and Cell Server binaries.288