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Dell PowerMax and VMAX Family Solutions Design 2023 > PowerMax and VMAX Family Solutions Design (PowerMax and VMAX All Flash Design Options) > Flashcards

PowerMax and VMAX Family Solutions Design (PowerMax and VMAX All Flash Design Options) Flashcards

1
Q

What PowerMax components must be balanced across engines?

A

RAID Groups
IO Modules
Emulations
Cache
DAEs

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2
Q

What are the max IOPS on PowerMax 2000?

A

2.7M

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3
Q

What are the max IOPS on PowerMax 8000?

A

15M

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4
Q

What are the max IOPS on VMAX 250F?

A

1M

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5
Q

What are the max IOPS on VMAX 950F?

A

6.7M

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6
Q

What is the usable capacity on PowerMax/VMAX?

A

physical capacity that is stored within Storage Resource Pools

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7
Q

How is usable capacity accessed on PowerMax/VMAX?

A

accessed by hosts using thin provisioned devices called TDEVs

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8
Q

What is the TDEV capacity on PowerMax/VMAX?

A

effective capacity

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9
Q

What is true about adding drives on PowerMax/VMAX?

A

can intermix drive sizes in the same system

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10
Q

What is Automated Data Placement on PowerMax/VMAX?

A

ability of system to intelligently manage data placement between two different drive technologies in the same system

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11
Q

What are Advanced Wear Analytics on PowerMax/VMAX?

A

help to manage drives in storage tier and make it easy to add and rebalance

ensure write distribution

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12
Q

What PowerMax/VMAX system doesn’t support different cache sizes between engines?

A

VMAX 950F

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13
Q

When does PowerMax 2000 support engines w/ different cache sizes?

A

in dual Brick systems only

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14
Q

When does PowerMax 8000 support engines w/ different cache sizes?

A

requires minimum of 4 bricks

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15
Q

When does VMAX 950F support engines w/ different cache sizes?

A

in dual Brick systems only

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16
Q

What is the Optimized service level?

A

designed to use all allowable resources and it not managed to assist any other SLs

no target, upper or lower response time

17
Q

What attributes do Bronze and Silver SLs have?

A

have target, upper, and lower response time designed to allow higher priority SLs to be unaffected

18
Q

How are Bronze and Silver SLs designed?

A

such that their average response time will be greater than or equal to the lower response limit

19
Q

What attributes do Gold, Platinum and Diamond SLs have?

A

have target and upper response time limit

have highest priority for performance

20
Q

How is RAID setup in PowerMax/VMAX?

A

use a single RAID scheme for the entire system

all additional bricks and devices use same RAID scheme as initial usable capacity regardless of drive size by new drive pack

21
Q

How is the RAID determined on PowerMax/VMAX?

A

determined by initial usable capacity

22
Q

What RAID schemes are supported on PowerMax 2000?

A

RAID 5 (7+1) default
RAID 5 (3+1)
RAID 6 (6+2)

23
Q

What RAID schemes are supported on PowerMax 8000?

A

RAID 5 (7+1) default
RAID 6 (6+2)

24
Q

What RAID schemes are supported on VMAX 250F?

A

RAID 5 (7+1) default
RAID 5 (3+1)
RAID 6 (6+2)

25
Q

What RAID schemes are supported on VMAX 950F?

A

RAID 5 (7+1) default
RAID 6 (14+2)

26
Q

How does RAID 5 work?

A

uses rotating parity across all drives in the group

27
Q

How does RAID 6 work?

A

uses both horizontal and diagonal parity distributed across all drives in group

28
Q

What are the performance characteristics of RAID 5?

A

Fast Read
Good Write

29
Q

What are the performance characteristics of RAID 6?

A

Fast Read
Fair Write

30
Q

What is the typical workload skew for storage systems?

A

85/15

31
Q

What are the available IO Modules on PowerMax?

A

iSCSI (10G)
Fibre Channel (16G, 32G)
eNAS (10G SFP or Ethernet)
eNAS Tape Backup (8G FC)
FICON (16G)

32
Q

What IO Module is only available on PowerMax 8000 and VMAX 950F?

A

FICON

can be single or multimode

33
Q

What IO Modules only come w/ 2 ports on PowerMax?

A

eNAS
eNAS Tape Backup

34
Q

What are the IO Modules available on VMAX?

A

Fibre Channel (8G, 16G)
iSCSI (10G)
eNAS (10G SFP/Ethernet)
eNAS Tape Backup (8G FC)
FICON (16G)
SRDF (Ethernet)

35
Q

What protocol is available on PowerMax but not VMAX?

A

NVMe/FC

must have 32G FC IO Module

36
Q

How does PowerMax/VMAX scale up?

A

adding capacity packs

each pack has multiples of 13TBu (11 or 13TBu if it’s a VMAX 250F)

37
Q

How does PowerMax/VMAX scale out?

A

adding more bricks w/ included capacity in the system

38
Q

How must PowerMax engines be configured?

A

all engines must be configured identically w/ respect to SCM for IO balance

same RAID scheme

Dell PowerMax and VMAX Family Solutions Design 2023 (28 decks)

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