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IBM 81Y4484 ServeRAID M5100 Series 512MB Cache RAID 5 Upgrade (System X)

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  • IBM 81Y4484 ServeRAID M5100 Series 512MB Cache RAID 5 Upgrade (System X)

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  • IBM 81Y4484 ServeRAID M5100 Series 512MB Cache RAID 5 Upgrade (System X)
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  • Sku: 81y4484
  • Model: 1931828

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Quick Overview

IBM ServeRAID M5100 Series 512MB Cache/RAID 5 Upgrade (System X)
*Pictures and description of IBM 81Y4484 ServeRAID M5100 Series 512MB Cache RAID 5 Upgrade (System X) are for your convenience only and may not be accurate. You should by no means buy this product based on the description or the picture. We will ship you the item based on the product name and manufacturer number only. For more information please visit the manufacturer's website (Manufacturer Product Page).


  • Auto-resume on array rebuild or array reconstruction after loss of system power
  • Auto-resume uses non-volatile NVRAM to save rebuild progress during a host reboot or power failure 
  • to automatically resume from the last checkpoint. Auto-resume ensures that data integrity is 
  • maintained through the process. The card supports a number of features that are able to be 
  • implemented without rebooting the server. Applications such as email and web server benefit from 
  • avoiding downtime during transition. 
  •  Online Capacity Expansion
  • Online Capacity Expansion (OCE) allows the capacity of a virtual disk to be expanded by adding new 
  • physical disks or making use of unused space on existing disks, without requiring a reboot.
  •  Online RAID Level Migration 
  • Online RAID Level Migration (also known as logical drive migration) provides the ability to migrate a 
  • virtual disk from any RAID level to any other RAID level without requiring a reboot. System availability 
  • and application functionality remain unaffected. 
  •  Fast initialization for quick array setup
  • Fast initialization quickly writes zeroes to the first and last sectors of the virtual drive. This allows you 
  • to immediately start writing data to the virtual drive while the initialization is running in the background.
  •  Consistency check for background data integrity 
  • Consistency check verifies that all stripes in a virtual disk with a redundant RAID level are consistent. 
  • The consistency check will mirror data when an inconsistent stripe is detected for a RAID 1 and 
  • recreate the parity from the peer disks in the case of a RAID 5 or RAID 6. Consistency checks can be 
  • scheduled to take place periodically. 
  •  Extensive online configuration options and advanced monitoring and event notification
  • Management tools provide convenience for configuration of logical volumes and alerting when errors 
  • have occurred or are about to occur. 
  •  Patrol read for media scanning and repairing
  • Patrol read is a background sentry service designed to proactively discover and correct media defects 
  • (bad sectors) that arise normally as a disk drive ages. The service issues a series of verify 
  • commands, and if a bad block is discovered, the card's firmware uses RAID algorithms to recreate the 
  • missing data and remap the sector to a good sector. The task is interruptible based on controller 
  • activity and host operations. The firmware also provides an interface where the patrol read task can 
  • be initiated, set up for continuous operation, and terminated from a management application. Patrol 
  • read can be activated by manual command or automatically. 
  •  Global and dedicated Hot Spare with Revertible Hot Spare support
  • A hot spare rebuilds data from all virtual disks within the disk group in which it is configured. 
  • ServeRAID provides the ability to define a physical disk as a hot spare to replace a failed drive. Hot 
  • spares can be configured as either global or dedicated. A global hot spare allows any physical drive to 
  • be designated as a hot spare. A dedicated hot spare allows the user to assign a hot spare drive to a 
  • particular array of the same drive type. 
  •  Single controller multipathing (failover) I/O load balancing
  • The ServeRAID's firmware detects and uses multiple paths from the controllers to the SAS drives that 
  • are in enclosures. With redundant paths to the same port of a device, if one path fails, another path 
  • can be used to communicate between the controller and the drive. Using multiple paths with load 
  • balancing, instead of a single path, can increase reliability through redundancy

Additional Information

Name IBM 81Y4484 ServeRAID M5100 Series 512MB Cache RAID 5 Upgrade (System X)
Supplier Product Number 1931828
Brand IBM
Condition Brand New
External Connector 2 x SFF-8088 mini-SAS
Transfer Rate Up to 6Gb/s
Form Factor Low Profile
RAID 0/1/10
Interface PCI Express 3.0
Cache Memory 512MB
Supported Device SATA / SAS
Dimension Height: 15 mm (0.6 in)
Width: 69 mm (2.7 in)
Depth: 168 mm (6.6 in)

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