IBM #2740 Dasd controller PCI adapter

Last Update
18 / 03 / 2020
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Specification of IBM #2740 Dasd controller PCI adapter

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IBM #2740 DASD Controller PCI adapter card untuk AS400

SCSI RAID Controller
IBM 2740 is an Ultra SCSI disk and tape controller with a 4MB write-cache that provides RAID-5 protection for internal disk units. The #2740 controls Ultra, Fast Wide and Fast Narrow SCSI disk and tape units installed in the base system unit. In addition to providing RAID-5 protection for disks, #2740 also works as a high-performance controller for disks protected by system mirroring or disks with no protection. The #2740 controller supports a maximum of ten drives. A minimum of four drives of the same capacity are needed for a valid RAID-5 configuration. A maximum of two arrays are allowed per controller, with a maximum of ten drives allowed per array. All drives in an array must be of the same capacity. Parity is spread across four drives for arrays of four to seven drives. Parity can be spread across either four or eight drives for arrays of eight to ten drives. For systems started with eight to ten drives in an array, the parity for that array will be spread across eight drives. For systems that are started with less than eight drives in an array (and later field-upgraded eight, nine, or ten drives), the RAID function must be stopped and then started before the parity can be spread across eight drives. The #2740 also supports one CD-ROM and one internal tape unit when placed in a system unit.
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PT. Intragama Ciptadata

Menjual / Membeli/ Menyewakan server refurbished IBM AS400/ RISC6000, Printer IBM, DASD, Memory, Dumb terminal, Thin client baik sparepart maupun mesinnya.
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