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Tim Jones
February 22, 2016 at 3:05 am in reply to: Tandberg LTO drive (LTO 3503) / Thunderbolt

… and, there are no pSCSI HBA’s that work in a Thunderbolt environment. We’re tried to hack an ATTO UL5D, but no luck.

The last working pSCSI solution that we can get consistent functionality is the ATTO UL5D in a Mac Pro running OS X 10.5.8. The drivers simply either don’t work and are ignored if you force load them, or actually cause a boot-time crash under 10.9+

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 22, 2016 at 2:24 am in reply to: IBM TS3100 LTO-6 SAS error

HI Bjorn,

Please see my other note – we are looking into the verify performance issue, but it’s very odd since the version of the BRU backup has not changed in some time.

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 22, 2016 at 2:22 am in reply to: Slow verify with BRU-PE

Hi Guys,

We’re looking into this, however, it’s odd since the back-end bru engine component hasn’t changed in quite some time.

What is the BRU version (not BRU PE) that you have?

In a Terminal type:

bru -h

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 16, 2016 at 8:38 pm in reply to: LTFS & IBM LTO 5 Formating Medium Error

Unfortunately, only someone from IBM can answer that question completely. It appears that the file that you have downloaded is corrupt in some manner.

Are you trying tyo load a specific file or are you trying to load the ISO file?

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 16, 2016 at 6:50 pm in reply to: LTFS & IBM LTO 5 Formating Medium Error

You are trying to boot the AIX CD from a PC – they are not compatible. A/IX is an operating system like Windows or Linux or OS X.

What you need is the IBM tools and just the IBM firmware for your drive. You then use the IBM diagnostic tool to update the firmware and microcode using the files that you download from IBM that are specific to your drive.

It may be that the CD image that you downloaded simply contains the files that you need and is not a bootable CD image. What if you mount the CD image and the look at its contents for the firmware and microcode files that you need to use via the IBM diagnostic tool?

Also, if you change SAS host bus adapters, you may also need to update to the latest drivers for the new card.

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 12, 2016 at 2:40 pm in reply to: LTFS & IBM LTO 5 Formating Medium Error

Hi Piotr,

Matt and a few others have resolved this issue by updating the firmware in their tape drives. Here’s a moderately helpful link:

ftp://ftp.software.ibm.com/software/server/firmware/HHLTO5.html

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 10, 2016 at 5:57 pm in reply to: Tandberg LTO drive (LTO 3503) / Thunderbolt

It is a SAS, pSCSI, or Fibre-Channel version?

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
February 8, 2016 at 6:40 pm in reply to: I Need a (Mac Based) Database for Cataloguing LTO Tapes

HI Stanton,

What Software are you using to write your tapes?

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
January 28, 2016 at 5:23 pm in reply to: HP StoreOpen LTFS

Nope – your limitation there is 1GbE. That results in maximum of 88MB/sec cooked data (data after network packet infrastructure is stripped off).

It’s always the slowest component that affects your throughput:

Slow 5400RPM drive = 60MB/sec
Single 7200RPM drive = 88MB/sec
Singe 10KRPM drive = 120MB/sec
2, 3, 4, etc. – multiplied throughput up to the speed of your interconnect (net, SAS, FC, Thunderbolt, USB-3)

USB-3 = 430MB/sec MAX
eSATA = 520MB/sec MAX
Thunderbolt 1 = 800MB/sec MAX
Thunderbolt 2 = 1.54GB/sec MAX
SAS 6Gb = 580MB/sec per channel MAX
SAS 12GB = 1.1GB/sec per channel MAX
FC 8Gb = 775MB/sec MAX
FC 16Gb = 1.52MB/sec MAX

1GbE Network = 88MB/sec
10GbE Network = 920MB/sec

A 1 drive, 7200RPM drive will do 88MB/sec on any of those connections
An 8 drive, 7200RPM RAID 0 chassis that COULD do 700MB/sec connected via Thunderbolt 2 would top out at 700MB/sec, Thunderbolt 1 would top out at 700MB/sec, and via USB-3 would top out at 430MB/sec.
A 4 drive, 7200PM RAID 0 chassis that could do 352 MB/sec would run at 352MB/sec regardless of the interconnect layer.

* all numbers are ±5% and come from real world lab tests.

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!
Tim Jones
January 28, 2016 at 5:10 pm in reply to: USB 3 vs Thunderbolt?

Correct – a single drive will never really get you where you need to go performance-wise. Both interfaces are equal in that situation.

Tim
—
Tim Jones
CTO – TOLIS Group, Inc.
https://www.tolisgroup.com
BRU … because it’s the RESTORE that matters!

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