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Chapter 3. RAS 61
additional guidance on the CRU replacement procedure is required. This includes a situation
in which it is unclear which CRU has failed. This will prevent an incorrect maintenance
procedure from taking place. After the defective CRU has been replaced, the CRU fault
indicator will turn off. Pressing the Remind button will have no effect on the state of the CRU
Endpoint Indicator.
3.5.4 Parts installation and repairs
The DS6000 has been designed for ease of maintenance. This allows the user to perform the
vast majority of service tasks.
Parts replacement
With the DS6000, an IBM Systems Service Representative (SSR) is not needed to perform
the majority of service tasks required during normal operations. Using light path diagnostics it
is possible for the user to perform problem determination, parts ordering, and parts
replacement.
CRU parts versus FRU parts
Within all IBM machines, spare parts are divided into two categories: CRU parts (customer
replaceable units) and FRU parts (field replaceable units). If a part is designated a CRU, this
implies that it can be safely and easily replaced by an end user with few or no tools. If a part
is designated a FRU, then this implies that the spare part needs to be replaced by an IBM
Service Representative. Within CRU parts, there are currently two tiers: Tier 1 CRUs are
relatively easy to replace, while Tier 2 CRUs are generally more expensive parts or parts that
require more skill to replace.
Tier 1 CRU parts:
Battery backup units
Cables - Ethernet, serial, fibre optic, and power
Disk drive modules
Operator panels - front and rear display
Power supplies
RAID controller and SBOD controller cards
SFPs (2Gbps small form factor plugable fibre optic units)
Currently the only Tier 2 CRU is the entire chassis for either the storage or expansion
enclosures. There are currently no FRU parts for the DS6000.
While the DS6000 is under warranty, IBM will ship a replacement CRU to the machine
location free of charge, provided the machine is located in a metro area that is serviced by
IBM. You should check with your IBM sales representative or IBM Business Partner for
details. Installation of Tier 1 CRUs is the customer’s responsibility. If an IBM SSR installs a
Tier 1 CRU at the customer’s request, there will be a charge for the installation. However, for
machines with an on-site same-day response service agreement, IBM will replace a Tier 1
CRU at the customer’s request, at no additional charge. The customer may choose to install a
Tier 2 CRU themselves, or request IBM to install it, at no additional charge. When the
customer calls in for service and the problem can be fixed by a Tier 2 part, the customer is
given the choice to decide at that point if they have the skills on hand to replace the part.
- The IBM TotalStorage 1
- DS6000 Series: Concepts 1
- Contents ix 11
- LSS X'17' 100
- LSS X'18' 100
- DB2-test 100
- 4.2.7 Address groups 101
- 4.2.8 Volume access 101
- Host attachment 102
- Volume group 102
- 4.2.10 Placement of data 104
- Host LVM volume 105
- 5.1 DS6000 highlights 108
- 5.1.2 DS6000 Model 1750-EX1 109
- Loop 0) 111
- Loop 1) 111
- Controller 0 112
- Controller 1 112
- Copy Services 113
- 6.2 Copy Services functions 114
- Source Target 115
- 6.2.2 FlashCopy options 116
- Incremental FlashCopy 117
- Waiting write operation 119
- FlashCopy to 120
- PPRC Primary 120
- Persistent FlashCopy 121
- Global Copy (PPRC-XD) 122
- Server write 123
- Write to secondary 123
- (non-synchronously) 123
- Write acknowledge 123
- How Global Mirror works 124
- Global Mirror - How it works 125
- 127
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