Centos – Why there is no journalctl in the centos 6.6 box and how to install/enable it

I'm assuming you have SATA support on your motherboard. Is there anything presently using the SATA interface? CD/DVD drive, perhaps?

Try a dmesg | grep -i sata and see what's returned. On a nearby desktop PC running CentOS, I tried and received the following output:

[root@bootylicious03 ~]# dmesg | grep -i sata
ata1: SATA max UDMA/133 abar m2048@0xcf204000 port 0xcf204100 irq 58
ata2: SATA max UDMA/133 abar m2048@0xcf204000 port 0xcf204180 irq 58
ata3: SATA max UDMA/133 abar m2048@0xcf204000 port 0xcf204200 irq 58
ata4: SATA max UDMA/133 abar m2048@0xcf204000 port 0xcf204280 irq 58
ata5: SATA max UDMA/133 abar m2048@0xcf204000 port 0xcf204300 irq 58
ata6: SATA max UDMA/133 abar m2048@0xcf204000 port 0xcf204380 irq 58
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata4: SATA link down (SStatus 0 SControl 300)
ata5: SATA link down (SStatus 0 SControl 300)
ata6: SATA link down (SStatus 0 SControl 300)

SATA is addressed by the libata kernel module in CentOS, and that may already be loaded in your existing setup (check with lsmod). I don't think you'll need to reinstall anything for this. If the drives are already physically connected and powered on, did you look for the additional devices in dmesg or with fdisk -l?

To get the export (exp) and import (imp) binaries, install the full Oracle Client, instead of the Instant Client or the full RDBMS. The 11gR2 Client is actually the 4th file of a 7 file set for the full RDBMS. The latest version is 11.2.0.3.0 (659,229,728 bytes, released in Q4 2011 - technically called a "patch set" but it is a complete install). It is not available for public download. (Only the obsolete 11.2.0.1.0 for Linux x86-64 is available publicly).

To download the full Oracle Client, follow these steps:

1. Log in to My Oracle Support (MOS), formerly known as metalink.

2. Click the "Patches & Updates" menu at the top.

3. In the Patch Search section, click the Search tab.

4. Enter 13390677 in the "Patch Name or Number" field. (13390677 is version 11.2.0.4.0)

5. Also select a "Platform". (e.g., "Linux x86-64")

6. Click Search.

7. In the search results, click on the patch number to display the details or click Download - assuming your MOS account has been given download privileges.

The file name for the client-only download is "p13390677_112040_platform_4of7.zip" (where platform is "Linux-x86-64" for example).

NOTE: exports/dumps are not true backups. They are only logical copies of the database. The meta-data and indexes get re-created during import and so won't be byte-for-byte identical to the source database.