LPIC 1011 | Karteikarten online lernen

LPIC 101.1 (75 Karten)

Sag Danke

What is the ATA standard, what does it stand for, and what are its variations? What are the three most popular storage mediums?

ATA stands for Advanced Technology Attachment
PATA is Parallel ATA - the ATA standard
SATA is Serial ATA -

SCSI, Small Computer Systems Interface is another common standard, with its own variations.

Tags: 101.1, ata, hard drives, pata, sata, scsi
Quelle:

24
Kartenlink

What is the ATA standard, what does it stand for, and what are its variations? What are the three most popular storage mediums?

ATA stands for Advanced Technology Attachment
PATA is Parallel ATA - the ATA standard
SATA is Serial ATA -

SCSI, Small Computer Systems Interface is another common standard, with its own variations.

Tags: 101.1, ata, hard drives, pata, sata, scsi
Quelle:

32
Kartenlink

What do most Linux SATA drivers treat SATA disks like?

SCSI drives.

Tags: 101.1, hard drives, linux, sata, scsi
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33
Kartenlink

How many devices can a SCSI device support?

8 or 16 depending on the variety.

Tags: 101.1, bus types, scsi
Quelle:

34
Kartenlink

How do you identify SCSI devices?

Each SCSI device is identified by a unique ID that must be set by a jumper.

Tags: 101.1, bus types, linux, scsi
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35
Kartenlink

Are SCSI devices detected by a standard x86 BIOS? Can you boot from a SCSI drive?

No, but you can detect SCSI if the SCSI host adapter has its own BIOS included. Higher end SCSI host adapters generally have this capability, while the lower end ones do not.

Even with a host adapter that includes its own BIOS, you will still need to boot from PATA or SATA drive to detect the SCSI drives.

Tags: 101.1, BIOS, linux, scsi, x86
Quelle:

36
Kartenlink

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
Quelle:

37
Kartenlink

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
Quelle:

38
Kartenlink

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
Quelle:

39
Kartenlink

Logically, how is a SCSI bus mapped? Explain.

One-dimensionally. Basically, every device in the bus falls upon a straight line.

Each end of the SCSI bus must be terminated - and the bus must not fork or branch in any way. The word terminated refers to a special resistor pack that prevents signals from bouncing back and forth along the SCSI chain. The manual should contain information on how to terminate such a fork or branch.

Tags: branch, bus types, fork, hard drives, resistor, SCSI, termination
Quelle:

40
Kartenlink

When terminating, what parts of the chain must be terminated? What parts should not?

Devices mid-chain must not be terminated. Both ends of the SCSI chain must be terminated however. A SCSI host adapter qualifies as a device, so if it is at the end of the chain, it can be terminated.

Modern SCSI devices usually include a jumper or other setting to enable or disable termination.

Tags: 101.1, bus types, hard drives, host adapter, linux, SCSI, SCSI chain, termination
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41
Kartenlink

What are some of the common varieties that external devices come in?

USB
IEEE-1394
SCSI

You configure external SCSI disks just like internal disks, although the physical details of setting the SCSI ID number and termination may differ. This would be described in the manual.

Tags: 101.1, bus types, device types, hard drives, IEEE, linux, SCSI, USB
Quelle:

48
Kartenlink

Under Linux, what numbers are primary and extended partitions assigned? Provide examples.

One through four.

Examples: