APC SCSI-SATA II manual RAID introduction, Features

Chapter 1 RAID introduction

1.1 Features

nFront-end 2* 1Gb full iSCSI offload (complete ULP, TCP offload)

nSupports load-balancing & fail-over (802.3ad port trunking, LACP)

nSupports iSCSI jumbo frame

nSupports Microsoft Multipath I/O (MPIO)

nSupports RAID levels 0,1,0+1,3,5,6,10,30,50, 60 and JBOD

nLocal N-way mirror: Extension to RAID 1 level, N copies of the disk.

nGlobal and dedicated hot spare disks

nWrite-through or write-back cache policy for different application usage

nDedicated or shared cache allocation for volume usage

nSupports greater than 2TB per volume set (64-bit LBA support)

nSupports manual or scheduling volume snapshot (up to 32 snapshot)

nSnapshot rollback mechanism

nOnline volume migration with no system down-time

nOnline volume expansion

nInstant RAID volume availability and background initialization

nSupports S.M.A.R.T, NCQ and OOB Staggered Spin-up capable drives

IS16GL connects to the host system in iSCSI interface. It can be configured to any RAID level. IS16GL provides reliable data protection for servers and the RAID 6 function ready. The RAID 6 function allows two HDD failures without any impact on the existing data. Data can be recovered from the remaining data and parity drives. (Data can be recovered from the rest disks/drives.)

Snapshot-on-the-boxis a fully usable copy of a defined collection of data that contains an image of the data as it appeared at the point in time, which means a point-in-time data replication. It provides consistent and instant copies of data volumes without any system downtime. IS16GL Snapshot-on-the-box can keep up to 32 snapshots for all data volumes. Rollback feature is provided for restoring the previously-snapshot data easily while continuously using the volume for further data access. The data access is regular as usual including read/write without any impact to end users. The "on-the-box" terminology implies that it does not require any proprietary agents installed at host side. The snapshot is taken at target side and done by IS16GL. It will not consume any host CPU time thus the server is dedicated to the specific or other application. The snapshot copies can be taken manually or by schedule every hour or every day, depends on the modification.

IS16GL is the most cost-effective disk array subsystem with completely integrated high-performance and data-protection capabilities which meet or

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