"Small Computer System Interface-2", ANSI X3T9.2, Draft Revision 10k, March 17, 1993. Home/Search Document Not in Database Summary Related Articles Check |
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System-Oriented Evaluation of I/O Subsystem Performance - Ganger (1995) (7 citations) (Correct)
....lower transaction loss ratios than non priority algorithms and the other priority based algorithms described above. In all of these cases, the priorities assigned to each request reflects the priority or the deadline of the associated processes rather than criticality. Finally, the Head Of Queue [SCSI93] or express [Lary93] request types present in many I O architectures show recognition of the possible value of giving priority to certain requests. While present in many systems, such support is generally not exploited by system software. Currently, researchers are exploring how such support can ....
....components. The decision as to which component uses the bus at any point in time, or arbitration, may occur before each bus cycle (as is common for system buses and general I O buses, such as MicroChannel [Muchmore89] or less frequently (as is common for storage subsystem buses, such as SCSI [SCSI93]) In most storage subsystem models, buses are modeled as shared resources with ownership characteristics that depend on the arbitration technique employed. That is, the bus may be exclusively owned by one component for some period of time or several distinct data movements may be interleaved. ....
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"Small Computer System Interface-2", ANSI X3T9.2, Draft Revision 10k, March 17, 1993.
Automated Disk Drive Characterization - Schindler, Ganger (1999) (16 citations) (Correct)
....drives have been proposed [18, 1] there is no available system for easily retrieving parameters from a given disk drive. This paper presents DIXtrac (DIsk eXtraction) a program that can quickly and automatically characterize disk drives that understand Small Computer System Interface (SCSI) [2]. Without human intervention, DIXtrac can discover accurate values for over 100 performance critical parameters. It runs on standard Linux 2.2 systems, and requires no special hardware or operating system support. By automating this process, DIXtrac greatly simpli es the process of collecting disk ....
....locations) Also, while it is not strictly necessary, it is very useful to be able to temporarily turn o the cache. With just these capabilities, DIXtrac can determine the 100 performance critical parameters expected by the proven DiskSim simulator. DIXtrac currently works for SCSI disks [2], which ful ll the three listed requirements. First, the Translate option of the SEND DIAGNOSTIC and RECEIVE DIAGNOSTIC commands translates a given LBN to its physical address on the disk, given as a cylinder,head,sector tuple. SCSI also provides the READ DEFECT LIST command, which gives the ....
Small Computer System Interface-2, draft revision 10k edition, March 1993.
On-Line Extraction of SCSI Disk Drive Parameters - Worthington, Ganger, Patt.. (1995) (52 citations) (Correct)
....people at disk drive company XYZ and convince them to release what may be perceived as sensitive data. This report explains how to extract the required information directly from on line disk drives. In particular, it focuses on disks that conform to the popular Small Computer Systems Interface [SCSI93]. In some cases, standard SCSI commands are used to request parameter values from the disk. These values are typically static in nature, or nearly so. Although such interrogative extraction is convenient, it has two drawbacks: 1) Because the ANSI standard allows a disk drive manufacturer to ....
"Small Computer System Interface--2", ANSI X3T9.2, Draft Revision 10k, March 17, 1993.
Metadata Update Performance in File Systems - Ganger, Patt (1994) (41 citations) (Correct)
....substantially improvedthroughput (the increase in CPU usage caused by the memory copying is a small fraction of the total time) However, the copy on write approach should be more memory friendly. 7 A better approach would utilize an erase I O operation (e.g. the WRITE SAME SCSI command [SCSI93]) initializing the disk sectors without wasting a block of memory or transferring a block of zeroes from host memory to disk. Part Part NR Part CB Part NR CB Ordering flag implementation 0 200 400 600 800 Elapsed time (seconds) a) Elapsed time (seconds) Part Part NR Part CB Part NR CB ....
"Small Computer System Interface-2", ANSI X3T9.2, Draft Revision 10k, March 17, 1993.
On-Line Extraction of SCSI Disk Drive Parameters - Worthington, Ganger, Patt.. (1995) (52 citations) (Correct)
....at disk drive company XYZ and convince them to release what may be perceived as sensitive data. This paper explains how to extract the required information directly from the on line drives themselves. In particular, we focus on disks that conform to the popular Small Computer Systems Interconnect [SCSI93]. In some cases, we simply use standard SCSI commands to request parameter values from the disk. Such values are typically static in nature (or nearly so) Although such interrogative extraction is convenient, it has two drawbacks: 1) Because the ANSI standard allows a disk drive manufacturer to ....
"Small Computer System Interface-2", ANSI X3T9.2, Draft Revision 10k, March 17, 1993.
. Physical Layer - Levels Rs- Data (Correct)
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Small Computer System Interface -- 2, X3.131, standard, ANSI.
The H-Bus: A Media Acquisition Bus Optimized for Multiple .. - Wong, Watlington, Bove.. (Correct)
No context found.
Small Computer System Interface - 2, X3.131-199x, ANSI.
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