公开(公告)号：US5465382A

公开(公告)日：1995-11-07

申请号：US275934

申请日：1994-07-15

申请人： Kennith F. Day, III ,  William D. Lamear, Jr. ,  Edward R. Morse

发明人： Kennith F. Day, III ,  William D. Lamear, Jr. ,  Edward R. Morse

IPC分类号： G06F3/06 ,  G06F3/08 ,  G11B19/02 ,  G11B20/12 ,  G06F12/02

CPC分类号： G06F3/0601 ,  G11B19/02 ,  G11B20/1262 ,  G06F2003/0697

摘要： A computer installation is programmed for storing data in a magnetic disk DASD (direct access storage device) in the form of a track number identified by DASD cylinder number (CC) and DASD head number (HH). A re-writable, multi-disk optical storage which stores information in a fixed-block architecture including a sequence of sectors having the form of spirals on optical disk surfaces is enabled to emulate magnetic DASD by calculation-based conversion of storage references to magnetic DASD tracks to fixed-block optical sectors.

摘要翻译： 计算机安装被编程为以DASD气缸数（CC）和DASD头数（HH）标识的轨道号的形式将数据存储在磁盘DASD（直接存取存储设备）中。 将包含在光盘表面上具有螺旋形状的扇区序列的固定块结构中存储的信息的可重写多盘光学存储器能够通过基于磁性DASD的存储参考的基于计算的转换来仿真磁性DASD 轨道到固定块光学扇区。

公开(公告)号：US5566348A

公开(公告)日：1996-10-15

申请号：US965113

申请日：1995-10-22

申请人： Kirby G. Dahman ,  Kenneth F. Day III ,  Alfredo M. Diaz ,  Edward R. Morse II

发明人： Kirby G. Dahman ,  Kenneth F. Day III ,  Alfredo M. Diaz ,  Edward R. Morse II

IPC分类号： G06F3/06 ,  G06F12/12 ,  G11B27/00 ,  G06F12/08

CPC分类号： G06F3/0601 ,  G06F12/127 ,  G11B27/002 ,  G06F12/123 ,  G06F2003/0697 ,  G11B2220/20 ,  G11B2220/41 ,  G11B2220/90

摘要： A method for managing Data Storage Medium (DSM) mount and demount decisions in an automated data storage library that dynamically optimizes both sequential and random data access workloads. The demount decisions adapt to time-varying characteristics in the relative workload mix. When the workload is primarily sequential, the mount and demount decision procedure favors longer mount residency for sequential access streams, reducing the robotic picker activity and reducing response time for mount requests. When the workload is predominantly random access, sequentially accessed DSM residency time is generally reduced and preemptive demounts are more readily implemented. The disclosed method provides for preemptive demounts and uses a two-element decision process to select either a Least Recently Used (LRU) or a Least Recently Mounted (LRM) decision parameter. The relative weights of the LRU and LRM decision tests are varied responsive to measured changes in data access workload characteristics.

摘要翻译： 一种在自动数据存储库中管理数据存储介质（DSM）安装和拆卸决策的方法，可动态优化顺序和随机数据访问工作负载。 拆卸决策适应相对工作负荷组合中的时变特征。 当工作负载主要是顺序时，安装和拆卸决策过程有利于顺序访问流的更长的安装驻留，减少了机器人选择器活动并减少了安装请求的响应时间。 当工作负载主要是随机访问时，通常减少顺序访问的DSM驻留时间，并且更容易地实现抢占式卸载。 所公开的方法提供抢占式拆卸并且使用双元件决策过程来选择最近最少使用（LRU）或最近最少安装（LRM）最小安装（LRM）决策参数。 响应于测量的数据访问工作负载特征的变化，LRU和LRM决策测试的相对权重变化。

公开(公告)号：US5530819A

公开(公告)日：1996-06-25

申请号：US479291

申请日：1995-06-07

申请人： Kennith F. Day, III ,  William D. LaMear, Jr. ,  Edward R. Morse

发明人： Kennith F. Day, III ,  William D. LaMear, Jr. ,  Edward R. Morse

IPC分类号： G06F3/06 ,  G06F3/08 ,  G11B19/02 ,  G11B20/12 ,  G06F12/02

CPC分类号： G06F3/0601 ,  G11B19/02 ,  G11B20/1262 ,  G06F2003/0697

摘要： A computer installation is programmed for storing data in a magnetic disk DASD (direct access storage device) in the form of a track number identified by DASD cylinder number (CC) and DASD head number (HH). A re-writable, multi-disk optical storage which stores information in a fixed-block architecture including a sequence of sectors having the form of spirals on optical disk surfaces is enabled to emulate magnetic DASD by calculation-based conversion of storage references to magnetic DASD tracks to fixed-block optical sectors.

公开(公告)号：US5450384A

公开(公告)日：1995-09-12

申请号：US151239

申请日：1993-11-12

申请人： Kirby G. Dahman ,  Kenneth F. Day, III ,  Alfredo M. Diaz ,  William D. LaMear, Jr. ,  Edward R. Morse

发明人： Kirby G. Dahman ,  Kenneth F. Day, III ,  Alfredo M. Diaz ,  William D. LaMear, Jr. ,  Edward R. Morse

IPC分类号： G06F3/06 ,  G11B7/0037 ,  G11B11/105 ,  G11B17/22 ,  G11B20/12 ,  G11B27/00 ,  G11B27/034 ,  G11B27/11 ,  G11B27/32

CPC分类号： G11B27/329 ,  G11B17/22 ,  G11B27/002 ,  G11B27/034 ,  G11B27/11 ,  G06F3/0607 ,  G06F3/0667 ,  G06F3/0686 ,  G11B11/10595 ,  G11B20/1217 ,  G11B2220/20 ,  G11B2220/216 ,  G11B2220/2525 ,  G11B2220/41 ,  G11B2220/65 ,  G11B7/0037

摘要： Fast formatting of DASD emulating sectors on optical media is provided to reduce initialization time. Rather than format each track media when a new surface of an optical media is mounted in an optical storage library, a table is created on the media containing a set of entries for each track on the media surface. During initialization, a first table entry for each track is set to indicate that the state of the track is reliably KNOWN and a second entry is set to indicate that the track is virgin (unrecorded). Prior to a subsequent data access operation, the track table is copied from the media into a corresponding table in memory and each first entry in the media table is changed to indicate an UNKNOWN state. The memory track table is updated during the data access operations to reflect newly recorded or updated sectors. Upon completion of the data access, the media table is overwritten with the updated memory table.

摘要翻译： 提供光学介质上DASD仿真扇区的快速格式化，以减少初始化时间。 当将光学介质的新表面安装在光学存储库中时，不是格式化每个轨道介质，所以在介质上创建包含媒体表面上的每个轨道的一组条目的表。 在初始化期间，设置用于每个轨道的第一表条目以指示轨道的状态可靠地已知，并且设置第二条目以指示轨道是未处理的（未记录的）。 在进行后续数据访问操作之前，将轨迹表从媒体复制到存储器中的对应表中，并且更改媒体表中的每个第一条目以指示未知状态。 在数据访问操作期间更新记忆轨迹表以反映新记录或更新的扇区。 在完成数据访问后，用更新的内存表覆盖媒体表。