##### 



EXHIBIT 31.1

CERTIFICATION

I, Thomas P. Raimondi, Jr., Chairman, President and Chief Executive Officer of
MTI Technology Corporation (the Company), certify that:



| |  | 1. I have reviewed the annual report on Form 10-K of the Company for the fiscal
year ended April 5, 2003, as amended by this Amendment No. 1 on Form 10-K/A;                                                                                                                                                                                        
| |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| |  | 2. Based on my knowledge, this annual report, as amended, does not contain any
untrue statement of a material fact or omit to state a material fact necessary
to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this
annual report, as amended;
|
| |  | 3. Based on my knowledge, the financial statements, and other financial
information included in this annual report, as amended, fairly present in all
material respects the financial condition, results of operations and cash flows
of the registrant as of, and for, the periods presented in this annual report,
as amended;                    
|
| |  | 4. The registrants other certifying officers and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Rules 13a-14 and 15d-14 of the Exchange Act) for the registrant and we have:                                                                                                                 



| |  |  | a) designed such disclosure controls and procedures to ensure
that material information relating to the registrant, including
its consolidated subsidiaries, is made known to us by others
within those entities, particularly during the period in which
this annual report, as amended is being prepared;
| |  |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| |  |  | b) evaluated the effectiveness of the registrants disclosure
controls and procedures as of a date within 90 days prior to
the filing date of this annual report, as amended (the
Evaluation Date); and                                                                                                  
|
| |  |  | c) presented in this annual report, as amended, our conclusions
about the effectiveness of the disclosure controls and
procedures based on our evaluation as of the Evaluation Date;                                                                                                                       



| |  | 5. The registrants other certifying officers and I have disclosed, based on
our most recent evaluation, to the registrants auditors and the audit
committee of registrants board of directors (or persons performing the
equivalent function):
| |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | a) all significant deficiencies in the design or operation of
internal controls which could adversely affect the registrants
ability to record, process, summarize and report financial data
and have identified for the registrants auditors any material
weaknesses in internal controls; and
| |  |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| |  |  | b) any fraud, whether or not material, that involves management
or other employees who have a significant role in the
registrants internal controls; and                                                                                                                                        



| |  | 6. The registrants other certifying officers and I have indicated in this
annual report, as amended whether or not there were significant changes in
internal controls or in other factors that could significantly affect internal
controls subsequent to the date of our most recent evaluation, including any
corrective actions with regard to significant deficiencies and material
weaknesses.
| |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Date: August 12, 2003

| |  |                                                
| |  | -----------------------------------------------
| |  | /s/ Thomas P. Raimondi, Jr.                    
| |  | Thomas P. Raimondi, Jr.                        
| |  | Chairman, President and Chief Executive Officer