| 25L2143 - IBM 9.1GB ULTRA2
SCSI Hard Drive 7200RPM 80-pin The IBM Ultrastar 18ES is a
one-inch high low-profile hard disk drive that offers capacities of
18.2 gigabytes and 9.1 GB and average seek times as fast as 7.0 ms.
And with the first implementation of giant magnetoresistive (GMR)
head technology in a server-class drive, the Ultrastar 18ES provides
an unprecedented areal density of 3.67 GB per disk. IBM has
developed an integrated LSI chip that incorporates a microcomputer,
hard disk controller, and flash memory in a single chip to help
increase drive performance, reduce power usage, and enhance
reliability. Other features include Self-Monitoring Analysis and
Reporting Technology (S.M.A.R.T.), IBM Drive Temperature Indicator
Processor (Drive-TIP), No-ID sector formatting, and the Partial
Response Maximum Likelihood (PRML) digital data channel.
Features
- Multiple initiator support
- Variable logical block lengths (512 - 732 supported)
- Nearly Contiguous Read
- Read-ahead caching
- Adaptive caching algorithm
- Rotational Positioning Optimization
- Write Caching
- Back-to-back writes (merge writes)
- Tagged and untagged command queuing
- Command reordering (4 user selectable algorithms)
- Automatic retry and data correction on read errors
- Automatic sector reallocation
- In-line alternate sector assignment for high-performance
- Down-loadable firmware
- Customizing controller jumpers, for example:
- Auto spindle motor start
- Auto start delay
- Disable Target Initiated Synchronous Negotiation
- Disable Unit Attention
- Disable SCSI Parity
- Write Protection
Reliability Features
- Self-diagnostics on power up
- Dedicated head landing zone
- Magnetic actuator latch
- Entire Read/Write data path protected by a 32 Bit CRC
- 24 Byte Error Correcting Code (ECC)
- 9 Byte ECC on the fly
- Predictable Failure Analysis (PFA)
- Error Recovery Procedures (ERP)
- Data Recovery Procedures (DRP)
- Probability of not recovering data: 10 in 1015 bits read
- Event logging and analysis
- Drive-Temperature Indicator Processor (Drive-TIP) Temperature
monitoring and logging
Compatibility
- Dell PowerEdge 2300
- Dell PowerEdge 2400
- Dell PowerEdge 2450
- Dell PowerEdge 4300
- Dell PowerEdge 4350
- Dell PowerEdge 4400
- Dell PowerEdge 6300
- Dell PowerEdge 6400
- Dell PowerEdge 6450
- Dell PowerVault 200S (SCSI)E
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