Aspects of System Administration File-Systems and Disks

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  • Topic: Serial ATA, Parallel ATA, SCSI
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CS765 - Aspects of System Administration

Slide 1

CS765 - Aspects of System Administration Filesystems and Disks

Department of Computer Science Stevens Institute of Technology Jan Schaumann jschauma@cs.stevens.edu http://www.cs.stevens.edu/~jschauma/765-ASA/

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 2

Topics covered
Adding, (re-)partitioning, mounting disks requires understanding of: basic disk concepts basic filesystem concepts local and remote file systems

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 3

Topics covered
Adding, (re-)partitioning, mounting disks requires understanding of: basic disk concepts disk interfaces physical disk structure partitions basic filesystem concepts local and remote file systems

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 4

Topics covered
Adding, (re-)partitioning, mounting disks requires understanding of: basic disk concepts disk interfaces physical disk structure partitions basic filesystem concepts RAID logical volume managment device formatting local and remote file systems

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 5

Topics covered
Adding, (re-)partitioning, mounting disks requires understanding of: basic disk concepts disk interfaces physical disk structure partitions basic filesystem concepts RAID logical volume managment device formatting local and remote file systems the Berkeley Fast File System (FFS) NFS

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 6

Basic Disk Concepts: Disk Interfaces
Standard interfaces for connecting storage devices: SCSI ATA (IDE/EIDE and S-ATA) Fibre Channel Other interfaces: USB FireWire

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 7

Basic Disk Concepts: Disk Interfaces: SCSI
Remember that: each SCSI device needs a terminator (internal or terminator plug) each SCSI device (including the controller) needs a target number (or ID) this ID needs to be unique a single slower/older device will bring down speed for all devices attached to that controller hot swappable speed: up to 320 MB/s max cable length: up to 12 m max number of devices: up to 96

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 8

Basic Disk Concepts: Disk Interfaces: ATA
“Advanced Technology Attachment” Parallel ATA: Enhanced Integrated Device Electronics (EIDE) Extensions known as Advanced Technology Attachment Packet Interface (ATAPI) designed to be simple and inexpensive (controller build into the disk) speed: up to 133 MB/s max cable length: up to 46cm number of devices: 2 Serial ATA (ATA/ATAPI-7): hot swappable speed: up to 300 MB/s (SATA/300, aka “SATA II”); up to 150 MB/s in SATA/150 max cable length: up to 1 m number of devices: 1 Lecture 02: Filesystems and Disks January 30, 2006

CS765 - Aspects of System Administration

Slide 9

Basic Disk Concepts: Disk Interfaces: Fibre Channel
FibreChannel: point-to-point,in arbitrated loop or switched hot-pluggable speed: up to 2 GB/s max cable length: up to 20 m (copper) or up to 10 km (Fiber) number of devices: 2 (point-to-point), 127 (loop), or... 224 (switched)

Lecture 02: Filesystems and Disks

January 30, 2006

CS765 - Aspects of System Administration

Slide 10

Basic Disk Concepts: Disk Interfaces: USB, FireWire
“Universal Serial Bus”, current specification: 2.0 can provide power speed: 12 Mbit/s in USB 1.0; up to 480 Mbit/s in USB 2.0 max cable length: up to 5 m number of devices: up to 127 FireWire, aka IEEE 1394 speed: 400 Mb/s, 800 Mb/s and even up to 3.2 Gbit/s max cable length: up to 100 m number of devices: up to 63

Lecture 02:...
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