A&S20120815-Rectification Notice of High Disk Fault Rate of Seagate
ES.2 Hard Disks in Oceanspace Storage Products
INTERNAL
A&S20120815-Rectification Notice of High Disk Fault Rate of Seagate ES.2 Hard Disks
in Oceanspace Storage Products
Notice ID: NEWS1000000616
Severity
Major
Urgency
Minor
Product
Oceanspace S5000 series, Oceanspace S2000 series, and Oceanspace V1000 series
Family
Sub-products involved:
Oceanspace S5300/S5500/S5600
Oceanspace S2600
Oceanspace S2100/S2300/S2300E
Oceanspace V1800
Versions
Unrelated to product version
Involved
Application
Applicable to S5000, S2600, S2000, and V1000 storage devices that are
Scope
configured with Seagate ST31000340NS, ST3500320NS, ST3750330NS, and
ST3250310NS ES.2 disks and delivered from January 2009 to September
2010.
Release Date
2012-08-15
Precaution
1. For distinguished sites in China, the rectification must be complete before
2013-04-30.
2. For the other sites in China, if annual disk fault rates of these sites are higher
than 4%, central replacement is provided.
3. For the sites out of China, central replacement of Seagate ES.2 disks is not
provided for sites out of China. If these sites have faulty Seagate ES.2 disks,
engineers can apply for spare parts through the normal procedure
Requirement
Man-Hour
One person-day per disk (for reference only)
[Problem Description]
Seagate ES.2 SATA disks have incurred high disk fault rate on live networks of multiple sites.
According to statistics, there are over 100 sites whose annual disk fault rates are higher than the
industry average value 4%.
[Trigger Condition]
Because of the defective disk substrate flatness control process and insufficient design
margin, heads of Seagate ES.2 SATA disks easily rub with ridges on the substrates, causing bad
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A&S20120815-Rectification Notice of High Disk Fault Rate of Seagate
ES.2 Hard Disks in Oceanspace Storage Products
INTERNAL
sectors or head degradation.
[Impact and Risk]
Sites that use Seagate ES.2 disks suffer too many faulty disks. Frequent replacement of faulty
disks results in doubts about Huawei storage products and low customer satisfaction. If a RAID
group has multiple faulty disks that are not replaced in time, the RAID group will fail and
data will be lost.
[Measures and Solutions]
The Oceanspace S5000 series, Oceanspace S2000 series, and Oceanspace V1000 series have
abandoned Seagate ES.2 disks since November, 2010.
Solutions to high disk fault rate of Seagate ES.2 SATA disks on storage products for sites in
and out of China are as follows:
Sites in China:
 For distinguished sites in China, Storage provides spare parts of the same number of the
delivered Seagate ES.2 disks and replacement schemes.

For the other sites, frontline engineers check whether annual disk fault rates of these
sites are higher than 4%. For the sites whose annual disk rates are higher than 4%, if
customers agree on central replacement of Seagate ES.2 disks, Storage provides spare
parts of the same number of the delivered Seagate ES.2 disks and replacement schemes. For
the sites whose annual disk rates are lower than 4%, central replacement is not provided.
For faulty Seagate ES.2 disks at these sites, engineers can apply for spare parts through
the normal procedure.
Sites out of China
Up to now, disk fault rates at sites out of China are normal, so central replacement of Seagate
ES.2 disks is not provided for sites out of China. If these sites have faulty Seagate ES.2 disks,
engineers can apply for spare parts through the normal procedure (Spare parts disk BOM refer to
appendix 6).
Spare Part Strategy for Sites in China
Huawei frontline service engineers stat the sites and number of Seagate ES.2 disks at the site,
and applies spare disks through Batch Replacement Workflow.
Spare Part Strategy for Sites out of China
Huawei frontline service engineers apply for spare parts through the normal procedure.
[Contacts]
Technical support Storage PDT core team member: Duan Qiang (employee ID: 90002910;
mobile phone number: 15196662962)
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A&S20120815-Rectification Notice of High Disk Fault Rate of Seagate
ES.2 Hard Disks in Oceanspace Storage Products
INTERNAL
Contact of Storage precaution engineers: Ying Jun (employee ID: 90003727; mobile phone
number: 13880782160)
[Approval] Product development team leader
Storage LMT manager: Yang Bailiang (employee ID: 39035)
Appendix
1.
Document Type/Batch Replacement or Not
Type
Description
Rectification
Replacement of all or part of hardware or software of Huawei devices on
Central
Replacement
or Not
Yes
the live network (including software upgrades caused by software defects).
Rectification is initiated by Huawei and determined by Huawei R&D,
supply chain, and software service departments to rectify product design
defects, production defects, and parts batch problems that pose security
risks.
Warning
An official notice of risks that are detected in labs, production tests, or
No
device operation and may result in accidents or affect maintenance or
device operation. A warning describes the symptom, cause, and solutions
of a problem and warns frontline engineers to resolve the problem and to
prevent recurrence of the problem.
2. Seagate ES.2 Disk Replacement Strategy and Method
Contact the Storage precaution engineers: Ying Jun (employee ID: 90003727; mobile phone
number: 13880782160) to make corresponding scheme.
3.
Method of Checking For Seagate ES.2 Disks on a Disk Array
Run the command showdisk -p in the CLI mode in the storage:
Check the item list of “Model”, if disk model type of ST31000340NS, ST3500320NS,
ST3750330NS, and ST3250310NS exists, it means there is Seagate ES.2 disk in the storage.
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A&S20120815-Rectification Notice of High Disk Fault Rate of Seagate
ES.2 Hard Disks in Oceanspace Storage Products
INTERNAL
4. Formula for Calculating the Annual Disk Fault Rate
5. Spare parts disk BOM
Spare parts BOM
Product involved
Spare parts type
0231G329
S2600
1TB SATA disk
0235G012
S2000 .V1000
1TB SATA disk
0235G000
S5000
1TB SATA disk
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