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LPIC 101.1 (75 Cards)

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13
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Provide a brief summary of what the /proc file-system is?

The /proc file-system is considered a "pseudo file-system" and contains information about the running system.

Tags: fs, proc
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14
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Where can you find information on devices on the system's PCI bus?

Within /proc/pci

Tags: bus, fs, pci, proc
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25
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How do PATA drives function? What variations are there? Are they still in use today?

PATA disks use a parallel interface, meaning several bits are passed through the cable at once.

PATA cables are wide as a result, supporting either 40 or 80 lines, depending on the variety.

They are a bit outdated, but still in use today, particularly in CD-ROM and DVD-ROM drives.

Tags: cables, fs, hard drives, PATA
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29
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How are partitions identified in the Linux file system?

With a number after the device name. For exampe, /dev/hda1, /dev/hda2, etc.

Tags: 101.1, fs, hard drives, linux, partitions
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36
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Is SCSI device identification different than other hard drives? Explain.

Yes. SCSI IDs aren’t used to identify the corresponding device file on a Linux system. Hard drives follow the naming system /dev/sdx (where x is a letter from a up), SCSI tapes are named /dev/stx and /dev/nstx (where x is a number from 0 up), and SCSI CD-ROMs and DVD-ROMs are named /dev/scdx (where x is a number from 0 up).

Tags: 101.1, devices, fs, hard drives, linux, scsi
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37
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What problems can arise involving SCSI device numbering, and what are the best practices when adding new SCSI drives?

SCSI device numbering (or lettering) is usually assigned in increasing order based on the SCSI ID. If you have one hard disk with a SCSI ID of 2 and another hard disk with a SCSI ID of 4, they will be assigned to /dev/sda and /dev/sdb, respectively. The real danger is if you add a third SCSI drive and give it an ID of 0, 1, or 3.

This new disk will become /dev/sda (for an ID of 0 or 1) or /dev/sdb (for ID 3), bumping up one or both of the existing disks’ Linux device identifiers. For this reason, it’s usually best to give hard disks the lowest possible SCSI IDs so that you can add future disks using higher IDs.

Tags: 101.1, devices, fs, hard drives, linux, scsi
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38
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Can non-SCSI devices be assigned SCSI identifications in the file structure?

Yes. Non-SCSI devices such as USB drives or SATA drives can be mapped to the SCSI sub-system, and interfere with the SCSI device numbering if you are not careful.

Tags: 101.1, devices, fs, hard drives, linux, scsi
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43
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What are some of the key advantages of partitioning?

Multi-OS Support - Boot two operating systems requiring two different file systems
File-system Choice - Some file systems may be more suited to certain applications than others
Disk Space Management
Disk Error Management - Allows isolation of a problem, should a partition or file system become corrupt. Titanic style.
Security - Ability to set read-only file systems can add security, or be used for redundancy in the event that data is lost on a duplicate partition
Backups - They work better on entire partitions at a time, so segmenting your space into small, intelligently spaced surface areas allows for more effective backups and management.

Tags: 101.1, fs, hard drives, linux, partitions
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