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What is the Max Performance to Expect?

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I have roughly 3 Terabytes I need to backup daily, I understand the instant scan can improve performance, but it usually averages out to the low 900MB/minute. Is there a way to improve Retrospects performance or is this as good as it gets?


Current Config


Backup Server

Retrospect Server 12.0.0

Xserve 2008 2.8 QC 6GB Memory Mavericks 10.9.5

ATTO UltraSCSI Express UL5D (320 MB/s)

SCSI Array Promise vTrak M310P RAID 50 (12xWD20EFRX RED) 1MB Stripe 4KB Sector



Client Server

Retrospect Client 12.0.0

Xserve 2008 2.8 QC 6GB Memory Snow Leopard 10.6.8

ATTO Xtend SAN iSCSI Initiatior w/Marvell Yukon 88E8061 GbE Card

iSCSI Connected on Dedicated HP Procurve Switch 1800 Jumbo Frames

iSCSI Array Promise vTrakM610i RAID 10 (12xWD10EACS GREEN)  64KB Stripe 512 Sector


Performance Test 1

AJA System Test 10.5.2 Sweep File Sizes Test

Backup Server to SCSI Share W:171.9MB/s R:216.7MB/s

Client Server to iSCSI Share W:77.6MB/s R:79.8MB/s

Backup Server to Client Server over AFP W:58.2MB/s R:60MB/s


Performance Test 2

Retrospect Server 12.0.0

45 GB Mixed Media Share Block Level No Compression Media Verification Only

Source:Client Server

Using Retrospect Client: 1,616.6 MB/minute (26.94 MB/s)

Retrospect using AFP Share: 2,238.6 MB/minute (37.31 MB/s)

Retrospect using iSCSI Share: 2469.9 MB/minute (41.165 MB/s)


The iSCSI Share ignored ownership permissions, i would assume the AFP Share Ignores them as well.

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