home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Power Tools 1993 November - Disc 2
/
Power Tools Plus (Disc 2 of 2)(November 1993)(HP).iso
/
hotlines
/
periph
/
aryslide
/
gal.cpy
/
SCRIPT.TXT
next >
Wrap
Text File
|
1993-07-26
|
4KB
|
107 lines
Cascade II Slide Pitch Script
Slide #1 - Disk Solutions (SWSOL)
In general, customers have three alternatives for (external)
system disk storage. For customers who need high I/O
performance and are price sensitive, independent disks are
recommended. HP's newest external disks utilize the
industry standard SCSI-2 interface.
Customers with critical applications who require high data
availability and protection from data loss, should consider
disk arrays and mirrored disks (S/800 and S/900 only,
mirroring software is not currently offered on the S/700).
Disk arrays offer nearly the protection from failure of
mirroring, at a lower cost and with the added benefits of "hot
plug" disk modules and high connectivity.
A number of independent disks or two times the number of
disks in a mirrored configuration will provide similar I/O
performance. Disk Arrays in a high availability mode will
have a lower I/O capability than an equal "usable"capacity
configuration of independent or mirrored disks. If a
customer requires data protection and high I/O performance,
recommend lower capacity arrays (i.e. 2.7 Gbytes or 4.0
Gbytes) or mirrored disks. More smaller "spindles can
handle I/O concurrently.
Slide # 2 - Data Availability Hierarchy (SWHIER)
Disk Arrays provide high data availability through
redundancy of components which fail the most in a disk
subsystem -- the disk mechanisms and the cooling fans.
Mirrored disks provide an even higher level of protection due
to redundant power supplies, interfaces and cables.
Slide # 3 - Potential Disk Array Applications (SWDAAPPS)
Disk arrays are used with mission critical applications, where
downtime or data loss may cost companies thousands of
dollars. HP has seen a high volume of disk arrays used with
Financial, Manufacturing and Telecom applications. Also,
many arrays have been sold in place of mirrored disks for
Medical applications.
Slide #4 - HP-FL Disk Arrays Meet Key HP Business
System and Server Needs (SWNEED)
The key user needs that Cascade II addresses - Protection for
Critical Data (this includes uptime as well as protection from
data loss), High Disk Connectivity (this is important for
systems with over 20 GB of disk storage), and floorspace
savings (the 2 Gbyte mechanisms in Cascade II enable a 92%
savings in floorspace compared to an equal capacity of
7937s).
Slide #5 - New HP-FL Disk Arrays for Series 900, Features
and Benefits (SWBENE)
The key benefit is high availability (or protection from data
loss). The features that address this benefit are
the Raid 3 controller, hot-plug disk modules, reliable Coyote
4 mechanisms (300,000 hour MTBF) and redundant cooling
fans.
High connectivity is enabled because the HP-FL contoller is
viewed a one Logical Device, not each individual disk
mechanism in the array. Since HP-FL allows for 8 addresses
per interface and SCSI allows 7, Cascade II allows over four
times the connectivity when compared to 2 Gbyte SCSI
disks.
Slide # 6 - $/MB versus Capacity (SWCOST)
Cascade II provides a 20% improvement in $/MB over the
May 1 '93 Cascade I prices. (Cascade I prices were reduced
11% on May 1 '93).
Slide # 7 - Alternative Storage Solutions (SWCOMP)
This chart helps position the three storage alternatives for HP
systems; independent disks, disk arrays and mirroed disks.
Again, disk arrays provide high data availability (nearly the
level of mirroring) at a lower price. Arrays also offer the
benefits of high connectivity and "hot plug". However, there
is a performance trade-off with disk arrays if high random
I/O is required. Remember, RAID 3 arrays provide high
throughput on sequential transfers of large blocks (i.e. 64K)
of data, but do not deliver high random I/O when compared
to multiple independent disks.
Slide # 8 - Disk Array MPE/iX Support (SWMPEIX)
Note that Cascade II is not supported as LDev 1 until late
'93. We expect this support to be in place in September '93
when the Off-line diagnostic Support tape is updated.
Slide # 9 - Disk Array HP-UX Support (SWSUPP)
Note that Cascade II is not supported by GSY. Also, S/800
NIO systems with HP-UX 9.0 support Cascade I in
Independent mode. Independent mode is used when high
performance and high connectivity are required.
Independent mode does not offer any striping or protection
from a disk mechanism failure.