IEICE TRANSACTIONS on Electronics
Simplification of Optical Disk Cluster Drive
Summary :
Small-scale video on demand system will be necessary in the future. Cluster drives, which use optical disk drives, are a good buffer memory for this purpose because the cost per megabyte is low. An ordinary optical cluster drive has many SCSI buses and up to seven optical drives are connected to each SCSI bus. One drive from each bus is assembled to make a group of a cluster drive. The difference betweeen SCSI bus data transfer rate and sustained disk transfer rate enables the cluster drive to be simplified. Several drives on an SCSI bus make a sub-group. The video data is striped onto those sub-groups. When the total data transfer rate from disks within a sub-group exceeds the bus transfer rate, some drives can not acquire the bus. When drives connected to one SCSI bus are not identical, the block size of the data to be recorded on each drive has to be adjusted so that the maximum effective data transfer rate can be obtained. When the cycle times of a slow and fast drive are set identical, the effective data transfer rate is maximum, where one cycle consists of command time, minimum bus free time, disk read time, and bus transfer time.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E80-C No.9 pp.1149-1153
- Publication Date
- 1997/09/25
- Publicized
- Online ISSN
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- Type of Manuscript
- Special Section PAPER (Special Issue on High Density Information Recording Technologies)
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Kunimaro TANAKA, Yoshinori NEGISHI, Kyosuke YOSHIMOTO, Yasunori TAKAHASHI, "Simplification of Optical Disk Cluster Drive" in IEICE TRANSACTIONS on Electronics,
vol. E80-C, no. 9, pp. 1149-1153, September 1997, doi: .
Abstract: Small-scale video on demand system will be necessary in the future. Cluster drives, which use optical disk drives, are a good buffer memory for this purpose because the cost per megabyte is low. An ordinary optical cluster drive has many SCSI buses and up to seven optical drives are connected to each SCSI bus. One drive from each bus is assembled to make a group of a cluster drive. The difference betweeen SCSI bus data transfer rate and sustained disk transfer rate enables the cluster drive to be simplified. Several drives on an SCSI bus make a sub-group. The video data is striped onto those sub-groups. When the total data transfer rate from disks within a sub-group exceeds the bus transfer rate, some drives can not acquire the bus. When drives connected to one SCSI bus are not identical, the block size of the data to be recorded on each drive has to be adjusted so that the maximum effective data transfer rate can be obtained. When the cycle times of a slow and fast drive are set identical, the effective data transfer rate is maximum, where one cycle consists of command time, minimum bus free time, disk read time, and bus transfer time.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e80-c_9_1149/_p
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@ARTICLE{e80-c_9_1149,
author={Kunimaro TANAKA, Yoshinori NEGISHI, Kyosuke YOSHIMOTO, Yasunori TAKAHASHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Simplification of Optical Disk Cluster Drive},
year={1997},
volume={E80-C},
number={9},
pages={1149-1153},
abstract={Small-scale video on demand system will be necessary in the future. Cluster drives, which use optical disk drives, are a good buffer memory for this purpose because the cost per megabyte is low. An ordinary optical cluster drive has many SCSI buses and up to seven optical drives are connected to each SCSI bus. One drive from each bus is assembled to make a group of a cluster drive. The difference betweeen SCSI bus data transfer rate and sustained disk transfer rate enables the cluster drive to be simplified. Several drives on an SCSI bus make a sub-group. The video data is striped onto those sub-groups. When the total data transfer rate from disks within a sub-group exceeds the bus transfer rate, some drives can not acquire the bus. When drives connected to one SCSI bus are not identical, the block size of the data to be recorded on each drive has to be adjusted so that the maximum effective data transfer rate can be obtained. When the cycle times of a slow and fast drive are set identical, the effective data transfer rate is maximum, where one cycle consists of command time, minimum bus free time, disk read time, and bus transfer time.},
keywords={},
doi={},
ISSN={},
month={September},}
Copy
TY - JOUR
TI - Simplification of Optical Disk Cluster Drive
T2 - IEICE TRANSACTIONS on Electronics
SP - 1149
EP - 1153
AU - Kunimaro TANAKA
AU - Yoshinori NEGISHI
AU - Kyosuke YOSHIMOTO
AU - Yasunori TAKAHASHI
PY - 1997
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E80-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 1997
AB - Small-scale video on demand system will be necessary in the future. Cluster drives, which use optical disk drives, are a good buffer memory for this purpose because the cost per megabyte is low. An ordinary optical cluster drive has many SCSI buses and up to seven optical drives are connected to each SCSI bus. One drive from each bus is assembled to make a group of a cluster drive. The difference betweeen SCSI bus data transfer rate and sustained disk transfer rate enables the cluster drive to be simplified. Several drives on an SCSI bus make a sub-group. The video data is striped onto those sub-groups. When the total data transfer rate from disks within a sub-group exceeds the bus transfer rate, some drives can not acquire the bus. When drives connected to one SCSI bus are not identical, the block size of the data to be recorded on each drive has to be adjusted so that the maximum effective data transfer rate can be obtained. When the cycle times of a slow and fast drive are set identical, the effective data transfer rate is maximum, where one cycle consists of command time, minimum bus free time, disk read time, and bus transfer time.
ER -
English
