Dell 341-7212 User Guide - Page 80

BGI Rate, cache, Cache Flush Interval, caching, Coerced Size, contains the most recently accessed data

Get Dell 341-7212 - PERC 6/i Integrated SAS RAID Controller Card Storage PDF manuals and user guides View all Dell 341-7212 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 80 highlights

BGI Rate A controller property indicating the rate at which the background initialization of virtual disks will be carried out. BIOS Basic Input/Output System. The computer BIOS is stored on a flash memory chip. The BIOS controls the following: communications between the microprocessor and peripheral devices, such as the keyboard and the video adapter, and miscellaneous functions, such as system messages. cache Fast memory that holds recently accessed data. Use of cache memory speeds subsequent access to the same data. When data is read from or written to main memory, a copy is also saved in cache memory with the associated main memory address. The cache memory software monitors the addresses of subsequent reads to see if the required data is already stored in cache memory. If it is already in cache memory (a cache hit), it is read from cache memory immediately and the main memory read is aborted (or not started). If the data is not cached (a cache miss), it is fetched from main memory and saved in cache memory. Cache Flush Interval A controller property that indicates how often the data cache is flushed. caching The process of using a high speed memory buffer to speed up a computer system's overall read/write performance. The cache can be accessed at a higher speed than a disk subsystem. To improve read performance, the cache usually contains the most recently accessed data, as well as data from adjacent disk sectors. To improve write performance, the cache can temporarily store data in accordance with its write back policies. Coerced Size A physical drive property indicating the size to which a disk drive has been coerced (forced) to make it compatible with other disk drives that are nominally the same size. For example, a 4 Gbyte drive from one manufacturer might be 4,196 Mbytes, and a 4 Gbyte drive from another manufacturer might be 4,128 Mbytes. These drives could be coerced to a usable size of 4,088 Mbytes each for use in a disk group in a storage configuration. 80 Glossary

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
80
Glossary
BGI Rate
A controller property indicating the rate at which the background initialization
of virtual disks will be carried out.
BIOS
Basic Input/Output System. The computer BIOS is stored on a flash memory
chip. The BIOS controls the following: communications between the
microprocessor and peripheral devices, such as the keyboard and the video
adapter, and miscellaneous functions, such as system messages.
cache
Fast memory that holds recently accessed data. Use of cache memory speeds
subsequent access to the same data. When data is read from or written to main
memory, a copy is also saved in cache memory with the associated main memory
address. The cache memory software monitors the addresses of subsequent
reads to see if the required data is already stored in cache memory. If it is already
in cache memory (a cache hit), it is read from cache memory immediately and
the main memory read is aborted (or not started). If the data is not cached (a
cache miss), it is fetched from main memory and saved in cache memory.
Cache Flush Interval
A controller property that indicates how often the data cache is flushed.
caching
The process of using a high speed memory buffer to speed up a computer
system’s overall read/write performance. The cache can be accessed at a higher
speed than a disk subsystem. To improve read performance, the cache usually
contains the most recently accessed data, as well as data from adjacent disk
sectors. To improve write performance, the cache can temporarily store data in
accordance with its write back policies.
Coerced Size
A physical drive property indicating the size to which a disk drive has been
coerced (forced) to make it compatible with other disk drives that are nominally
the same size. For example, a 4 Gbyte drive from one manufacturer might be
4,196 Mbytes, and a 4 Gbyte drive from another manufacturer might be 4,128
Mbytes. These drives could be coerced to a usable size of 4,088 Mbytes each for
use in a disk group in a storage configuration.