IBM 150 Manuel D’Utilisation

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Storage Architectures and Devices 
121
4.6.1.1  4.5 GB Ultra SCSI 16-Bit Disk Drive (# 2900)
The 4.5 GB Ultra SCSI 16-bit disk drive is a high performance disk drive that 
provides 4.5 GB capacity that supports the Ultra SCSI interface speed of 40 
MB/s. To operate at 40 MB/s, Ultra-SCSI adapter (# 6206) is required.
4.6.1.2  4.5 GB Ultra SCSI 16-Bit Enhanced Disk Drive (# 3028)
The 4.5 GB Ultra SCSI 16-bit Enhanced Disk Drive is a high-performance 
disk drive that provides 4.5 GB capacity that supports the Ultra SCSI 
interface speed of 40 MB/s. It requires Ultra SCSI adapter (# 6206) to operate 
at 40 MB/s (only available for Model 260).
4.6.1.3  9.1 GB Ultra-SCSI 16-Bit 1-Inch High Disk Drive (# 2908)
The 9.1 GB Ultra SCSI 16-Bit 1-inch (25 mm) high disk drive offers high 
performance that provides 9.1 GB of storage capacity and supports the 
industry Ultra SCSI interface speed of 40 MB/s. To operate at 40 MB/s, Ultra 
SCSI adapter (# 6206) is required.
4.6.1.4  9.1GB Ultra SCSI 16-Bit Enhanced Disk Drive (# 3029)
The 9.1 GB Ultra SCSI 16-bit 1-inch (25 mm) High Disk Drive offers 
high-performance that provides 9.1 GB of storage capacity and supports the 
industry Ultra -SCSI interface speed of 40 MB/s. It requires an Ultra SCSI 
adapter (# 6206) to operate at 40 MB/s (only available for Model 260).
Table 29.  Internal Disk Drives for the Models 150 and 260
4.6.2  Internal CD-ROM Drive
Table 30 on page 122 provides an overview of the supported CD-ROM drives 
for the Models 150 and 260. The 32X max SCSI-II Internal CD-ROM drive is a 
tray loading CD-ROM drive providing up to 4800 KB/sec maximum media 
data transfer rate. It is a 5.25 inch half-high form factor, single-ended, 8-bit, 
multi-session capable, CD-ROM drive that provides state-of-the-art 
Capacity
4.5 GB
9.1 GB
Feature Code
# 2900 or # 3028
# 2908 or # 3029
Maximum Media Data Transfer Rate 
13.7 MB/s
22.4 MB/s
Average Seek Time
7.9 ms
6.7 ms
Rotational Speed
7200 RPM
7200 RPM
Average Latency
4.17 ms
4.17 ms
SCSI Interface
Ultra SCSI 
Ultra SCSI
Data Width
16-bit, single-ended
16-bit, single-ended